He appears to have married twice: first to Sabrina Fowler and second to Anna Louise Grierson.

MARRIAGE: Announcement in paper. MARRIED. In Calvert County on the 22nd ult. by Rev. Jacob Breeden, at the residence of John Barrett Esq., Mr. Thomas Cullimer to Miss Mahala Fowler. On the same evening, by the same, Mr. James Cochran to Miss Cullimber, and Mr. Sutton Fowler, to Miss Cullimber, sister of the above. Feb. 7, 1846 Baltimore Sun. (Mistake in article - James Cochran married Sabrina Fowler, sister to Mahala Fowler, Sutton Fowler married Drusilla Barrett)

CENSUS: 1850 1st District Calvert Co
46-46
James Cockran 25 ditcher born MD cannot read or write
Sabrina Cockran 20
Elizabeth J. Cockran 1
Mary R. Cockran 3
47-47
William Cockran 22 sailor born MD
Elizabeth J. 22
1850; Census Place: District 1, Calvert, Maryland; Roll: M432_288; Page: 3B; Image: 11.

CENSUS: 1860
James Cockron 38 born MD ditcher
Sylvania 34,
Rebecca 15,
Martha 8,
Amelia 3,
Sarah 6.
(where is other kids such as Laura)
Age in 1860: 38 Birthplace: Maryland Home in 1860: District 1, Calvert, Maryland Gender: Male Value of real estate: Post Office: Port Republic Roll: M653_470 Page: 0 Year: 1860

CIVIL WAR: Registration by James Cochran Residence: Election District, Calvert, Maryland Class: 2 Congressional District: 5th Age on 1 July 1863: 41 Estimated Birth Year: abt 1822 Race: White Place of Birth: Maryland

CENSUS: 1870
James Cochram 44, born MD day laborer
Sobrina 33,
Mahala 18,
Laura 15,
Jane 12,
James W 9,
Sarina 6,
Sobrina 3,
Somerset Hooks 21 black farm laborer
Dorcus 9/12 black born Aug. father of foreign birth.
Elbert Beverly 30, day laborer
Anna V. 3,
Mary E. Gott 30, asst. housekeeping.
Joel T. Gott 8.
1870; Census Place: District 1, Calvert, Maryland; Roll: M593_581; Page: 7A; Image: 17; Family History Library Film: 552080.

CENSUS: 1880 Census Calvert Co District 1 p. 32B.
James COCHRAN M Male W 52 MD Farmer parents born MD
Louisa COCHRAN Wife M Female W 24 MD Keeping House MD MD
James COCHRAN Son S Male W 19 MD Laborer MD MD
Brina COCHRAN Dau S Female W 13 MD At School MD MD
Aletha COCHRAN Dau S Female W 11 MD At School MD MD
John GRAYERSON SonL Male W 21 MD Laborer MD MD (Grierson)
Serena GRAYERSON (GRIERSON) Dau M Female W 18 MD At Home MD MD
1880; Census Place: District 1, Calvert, Maryland; Roll: 505; Family History Film: 1254505; Page: 32B; Enumeration District: 33; Image: 0726.

I HAVE TWO DIRECTORIES OF CALVERT COUNTY (1880 AND 1887)AND ONLY ONE SHOWS A COCHRANE. THE 1887 DIRECTORY HAS JAMES COCHRAN LIVING IN ST LEONARDS.

DEATH: He died after 1896 when his youngest child was born. County Death certificates started in 1898 and I have not found one for him. I have searched 1898 and through 1903 and he was not found in 1900 census.