Solomon's obituary states that his great-great-grandfather was John Hancock Jr., one of the signers of the Declaration of Independence.
However....
Alvin was, in actuality, the great-grandson of Henry Hancock, the brother of John Hancock, signer of the Declaration of Independence.

*Note: John Hancock, Jr., b. Jan. 23, 1737 in Braintree, Norfolk County, MA. and d. Oct. 8, 1793 in Hancock Manor, Boston, Suffolk County, MA. and is bur. in Granary Burying Ground, Boston, MA.
Immediate Family:
John's BIOLOGICAL parents were: Rev. John Hancock, Jr. and Mary Thaxter Thaxter
John was ADOPTED by Thomas Hancock, Esq. (1703-1764)
John marr. Dorothy 'Dolly' Scott
His children were: Lydia Henchman Hancock and John George Washington 'Johnny' Hancock
(Brother of Mary Perkins and Gen. Ebenezer Hancock)
Occupation: President of US Congress, Governor of Massachusetts, first signer of the Declaration of Independence.

Solomon's 3rd great-grandparents were:
John Hancock Sr. & Anna Webb.

Solomon's great-great-grandparents were:
Thomas Hancock, b. May 10, 1727 in Longmeadow, Hampden County, MA. and d. Mar. 12, 1804 in Longmeadow, Hampden County, MA. &
Jemima Wright, b. Jan. 23, 1729 in Chicopee, Hampden County, MA. and d. Aug. 6, 1809 in Seneca County, NY.

Solomon's great-grandparents were:
Thomas Hancock, b. Nov. 21, 1763 in Longmeadow, Hampden County, MA. and d. Oct. 1, 1844 in Hancock County, IL. &
Amy Ward, b. Feb. 28, 1769 in Somers, Tolland County, CT. and d. Jan. 14, 1847 in Pottawattamie County, IA.

Solomon's grandparents were:
Solomon Hancock, b. Aug. 14, 1793 in Springfield, Hampden County, MA. and d. Dec. 2, 1847 in Pottawattamie County, IA. &
Alta Adams (daughter of Asael Adams and Sarah Herrick), b. Mar. 17, 1795 in Pawlet, Rutland County, VT. and d. Jan. 18, 1835 in Clay County, MO.

Solomon's parents were:
Joseph Euclio Hancock, b. May 7, 1822 in Euclid, Cuyahoga County, OH. and d. Jul. 18, 1924 at the age of 102 in San Bernardino, San Bernardino County, CA. &
Nancy Augusta Bemis, b. Jun. 14, 1829 in Ellisburg, Jefferson County, NY. and d. Jun. 15, 1908 in San Bernardino, San Bernardino County, CA.

On Aug. 31, 1848, Joseph marr. (his 2nd wife), Nancy Augusta Bemis in Council Bluffs, IA.

Joseph & Nancy Hancock's children were:
1. Alvin R. Hancock, b. 1848 and d. 1849
2. Alvin Bemis Hancock, b. Jan. 13, 1850 in Council Bluffs, Pottawattamie County, IA. and d. Nov. 24, 1896 by suicide (ingesting poison), in San Bernardino, San Bernardino County, CA. Alvin marr. Elizabeth Penman Nish.
2. Elenorah/Elnora Hancock, b. Mar. 19, 1851 in Council Bluffs, Pottawattamie County, IA. (-who was almost buried alive as a tiny infant) and d. Jan. 26, 1949 in Highland, San Bernardino County, CA. Elenorah marr. George Miller
3. Solomon Hancock, b. Nov. 11, 1852 in Ogden, Weber county, UT. and d. Apr. 4, 1901 (in an insane asylum) in Highland, San Bernardino, CA. Solomon marr. Eudora Hammack.
4. Jerusha Hancock, b. Aug. 30, 1854 in San Bernardino, San Bernardino County, CA. and d. Nov. 18, 1953 at the age of 99 in San Bernardino, San Bernardino County, CA. Jerusha marr. Charles Hudson Tyler.
5. Lucina Harriet Hancock, b. Apr. 29, 1856 in San Bernardino, San Bernardino County, CA. and d. Apr. 22, 1938 in San Bernardino, San Bernardino County, CA. Lucina marr. George L. Lord
6. Foster K. Hancock, b. Oct. 21, 1857 in San Bernardino, San Bernardino County, CA. and d. Jul. 5, 1934 of a heart attack in San Bernardino, San Bernardino County, CA. Foster marr. Catherine Mapstead.
7. Joseph Nephi Hancock, b. Nov. 25, 1867 in San Bernardino, San Bernardino County, CA. and d. Mar. 3, 1917 by suicide (gunshot wound), in San Bernardino, San Bernardino County, CA

In the Jun. 22, 1860 U. S. census, 7 yr. old Solomon Hantock [Hancock], b. in UT., was attending school and living in San Bernardino, San Bernardino, CA. with his
37 yr. old (inferred) father, Joseph Hantock (Hancock), a farmer, b. in OH.
31 yr. old (inferred) mother, Nancy Hantock (Hancock), b. in NY.
19 yr. old (inferred) brother, Alvin Hantock, (Hancock), b. in IA.
9 yr. old (inferred) sister, Elnorah Hantock (Hancock), b. in IA.
5 yr. old (inferred) sister, Jerusha Hantock (Hancock), b. in CA.
4 yr. old (inferred) sister, Lucina Hantock, (Hancock), b. in CA.
2 yr. old (inferred) brother, Foster Hantock, (Hancock), b. in CA.

In the 1870 U. S. census, 17 yr. old Soloman Hancock, b. in UT., was living in San Bernardino, San Bernardino, CA. with his
48 yr. old (inferred) father, Joseph Hancock, a farmer, b. in OH.
41 yr. old (inferred) mother, Nancy Hancock, b. in NY.
20 yr. old (inferred) brother, Alvin Hancock, a farm laborer, b. in IA.
19 yr. old (inferred) sister, Elnora Hancock, b. in IA.
15 yr. old (inferred) sister, Jerusha Hancock, b. in CA.
14 yr. old (inferred) sister, Suana (Lucina) Hancock, attending school, b. in CA.
12 yr. old (inferred) brother, Forster (Foster) Hancock, attending school, b. in CA.
3 yr. old (inferred) brother, Joseph N Hancock, b. in CA.
Joseph Sr.'s real estate was valued at $400 and his personal estate at $2,000.

In the Jun. 12, 1880 U. S. census, 28 yr. old Solomon Hancock, working on the farm, b. in Utah Territory, was unmarried (engaged) and living at 86 8th St. in San Bernardino Twp., San Bernardino, CA. with his
58 yr. old father, Joseph Hancock, a farmer and stock dealer, b. in OH.
50 yr. old mother, Nancy Hancock, keeping house, b. in NY.
30 yr. old brother, Alvin B. Hancock, working on the farm, b. in IA.
26 yr. old sister, Jerusha Hancock, b. in CA.
13 yr. old brother, Joseph N. Hancock, b. in CA.
Joseph Sr.' father was b. in MA. and his mother in VT.
Nancy's parents were both b. in VT.

The Daily Courier (San Bernardino, CA.), P. 3, Col. 3
Fri., Oct. 11, 1889
MARRIED
HANCOCK - HAMMACK - At the Manse of the Presbyterian Church, October 9, 1889, by Rev. John Morrison, Solomon Hancock and Eudora I. (Imogene) Hammack of this city.

Solomon & Eudora's children were:
1. Seneca Phillip Hancock, b. Nov. 30, 1890 in San Bernardino, San Bernardino County, CA. and d. Feb. 3, 1978 in San Bernardino County, CA.
2. John Solomon Hancock, b. Jul. 17, 1893 in San Bernardino, San Bernardino County, CA. and d. Jul. 2, 1981 in San Bernardino, San Bernardino County, CA.
3. Eudora Jane Hancock, b. Aug. 19, 1896 in San Bernardino, San Bernardino County, CA. and d. Dec. 3, 1909 at the age of 13 in San Bernardino, San Bernardino County, CA.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 1, Col. 5
Tue., Dec. 1, 1896
A House Burned
The residence of Solomon Hancock, on Ninth street, near Mt. Vernon avenue, was burned to the ground Sunday afternoon. The fire started on the roof, and the high wind fanned the flames, and the house burned so rapidly that nothing was saved. The house was insured but the policy was burned, and the amount of insurance is unknown.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 5, Col. 4
Sun., Jun. 4, 1899
Excerpt from: SOLOMON HANCOCK IS INSANE
The balance of the day was taken up with consideration of the water case from Ontario in taking further testimony except the sending of Solomon Hancock to the Highland State Hospital as an insane person. The witnesses were Dora Hancock, Dr. Campbell and P.B. Hockaday, with Dr. J. M. Hurley and Dr. Wesley Thompson as the examining physicians. Solomon Hancock is a brother of Alvin Hancock who committed suicide two years ago by taking poison while in a fit of temporary insanity.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 5, Col. 4
Fri., May 11, 1900
BURIED UNDER THE BUGGY
What might have resulted in a serious accident came in the shape of an “upset” on Third street about 5 o’clock last evening.
It seems that Sol Hancock, living out in the Mt. Vernon district had occasion to come to town yesterday and was going up Third street when the accident occurred. He was holding his little girl (3 yr.-old Eudora) on his lap while his son (Seneca), a boy of some 9 years, was driving. The thoroughfare just in front of the Great American Tea company’s store was somewhat blocked with teams and in attempting to drive around one of these carriages, the buggy was turned completely over, and the occupants under it.
The boy was the first to make his appearance from the mis up - pulling his little sister out with him, while bystanders soon righted the carriage and assisted Mr. Hancock, who was not so fortunate as his children, to his feet.
All of the were rather badly frightened, but only the father seemed to have suffered injuries that were worthy of mention, and these were judged to be nothing but temporary bruises.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 5, Col.4
Sun., Jun. 4, 1899
Excerpt from: SOLOMON HANCOCK IS INSANE
The balance of the day was take up with consideration of the water case from Ontario in taking further testimony except the sending of Soloman Hancock to the Highland State Hospital as an insane person. The witnesses were Dora Hancock, Dr. Campbell and P. B. Hockaday, with Dr. J. M. Hurley and Dr. Wesley Thompson as the examining physicians. Soloman Hancock is a brother of Alvin Hancock who committed suicide two years ago by taking poison while in a fit of temporary insanity.

In the Jun. 30, 1900 U. S. census, 47 yr. old Solomon Hancock, a farmer, b. Nov. 1852 in UT., was shown as living on a farm he owned, free and clear, at 302 Ninth St. in San Bernardino Ward 5, San Bernardino, CA. with his
41 yr. old wife, Euroda (Eudora) Hancock, b. Aug. 1858 in MO.
9 yr. old son, Seneca P Hancock, b. Nov. 1890 in CA.
6 yr. old son, Solomon Hancock, b. Jul. 1893 in CA.
3 yr. old daughter, Eudora J Hancock, b. Aug. 1896 in CA.
Solomon and Eudora had been marr. for 10 yrs.
Eudora was the mother of 3 children, all still alive by this census.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 3, Col. 3-4
Fri., Apr. 5, 1901
DEATH OF SOLOMON HANCOCK
News was received yesterday of the death of Solomon Hancock of the Highland State Hospital, where he was sent as incurably insane two or three years since, soon after the suicide of his brother, Alvin, who killed himself while insane by taking poison. The funeral will be held this afternoon at 3 o’clock at the home of his father, Joseph Hancock, Sr., on Mt. Vernon avenue, Judge J. M. Morris officiating.
The deceased was 48 years of age, the son of Joseph Hancock Sr., and great-great grandson of John Hancock, one of the signers of the Declaration of Independence. He came to California when an infant with his parents and has spent his whole life since that event in this county. His father and mother, three sisters, Mrs. C. H. Tyler, Mrs. George Miller and Mrs. J. Lord, and two brothers, Foster and Joseph, survive him. He was born in Utah in 1853, coming to San Bernardino the following year. he leaves a wife and three children.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 5, Col. 2
Fri., Apr. 5, 1901
Vital Statistics
DIED
HANCOCK - At Highland, San Bernardino County, California, at the State Hospital, Solomon Hancock aged 48 years, a native of Utah.
Funeral from the home of his father, Joseph Hancock Sr., on Mount Vernon avenue, this Friday afternoon, at 3 o’clock, Judge J. M. Morris officiating.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 8, Col. 4
Sat., Apr. 6, 1901
While Judge J. M. Morris was conducting the funeral services of Solomon Hancock yesterday he was taken suddenly ill, carried home and physicians called, who pronounce his case a very critical one.

The San Bernardino Daily Sun (San Bernardino, CA.), P. 3, Col. 2
Sun., Apr. 7, 1901
Item from: PIONEER SOCIETY MEETING
Appropriate tributes of respect were rendered in memory of Wm. J. Linville, one of the fathers of the Riverside colony, and of Solomon Hancock, a great-great-grandson of John Hancock of Revolutionary fame, and the sympathy of the society was extended to the bereaved relatives.