Information gleaned from the biography of Lawrence Leonard on page 764 of The Centennial History of Oregon (Volume II) printed in 1912 by The S.J. Clarke Publishing Co., Chicago:
*Died 17 March 1905 in Josephine County, Oregon.
*Born in Tallow, County Cork, Ireland [Tallow is actually in County Waterford, which is on the western border of County Cork; note that County Fermanagh is 200 miles north - in Northern Ireland].
*Parents were William Leonard and Margaret Downing.
*Immigrated to the U.S. in 1855.
*Age at immigration was 17 [or born about 1838; the 1900 U.S. Census of Althouse, Josephine County, Oregon, recorded Lawrence's birth month and year as Aug. 1837].
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Following is a transcript of the biography of Lawrence Leonard on page 764 of The Centennial History of Oregon (Volume II) printed in 1912 by The S.J. Clarke Publishing Co., Chicago:

LAWRENCE LEONARD, who passed away in Josephine county on the 17th of March, 1905, was long numbered among the most influential men of southern Oregon, where he carried on mercantile interests for a number of years, was heavily interested in mining and also bought stock on an extensive scale. He was a native of Tallow, County Cork, Ireland, his parents being William and Margaret (Downing) Leonard. The ancestors of William Leonard, three generations back, went over to Ireland from France with Sir William Percival. Our subject emigrated to America with his father in 1855. At that early period William Leonard engaged in business as a grading contractor, assisting in the building of streets at Yonkers, New York. Subsequently he removed to Ohio and conducted a store near Chillicothe [Ross County, Ohio] until his return to the Emerald isle.

Lawrence Leonard, who was seventeen years of age when he came to this country with his father, learned the hatter's trade in New York. Later he crossed the plains to California with a herd of horses and there mined on the Feather river, making a fortune of ten thousand dollars in the diggings. Returning east, he purchased a farm near Decatur, Illinois, but after paying for the same discovered that his title was faulty and accordingly lost the property. In 1862 he was persuaded to come to Oregon by a Mr. Peter C. O'Reagan, who was in the east on a visit, and after arriving in this state worked for some time in the store of O'Reagan Brothers, merchants of Browntown [Josephine County, Oregon]. Mr. Leonard afterward embarked in business on his own account, conducting a meat market and general store at Democrat Gulch [Josephine County] for about seventeen years. During this period he was heavily interested in mining and also bought stock on an extensive scale, his energy and sound judgment winning him success in his various undertakings. In 1884 he removed to the ranch on which he spent his remaining years and on which his widow still resides. He died on the 17th of March 1905, passing away in the faith of the Catholic church. The period of his residence in this state covered more than four decades and he won and maintained an enviable reputation as one of the leading and respected citizens of Josephine county.

On the 11th of July, 1869, Mr. Leonard was joined in wedlock to Miss Mary Ellen A. Waters. Her father, David Waters, was a native of Bradford county, Pennsylvania, and in 1855 made his way to California. About six months later he came north to Oregon. Unto Mr. and Mrs. Leonard were born twelve children, six of whom still survive, as follows: Lawrence J., at home; William A. and Francis Joseph, both of whom are residents of Portland, Oregon; Leo Paul, living in Vancouver, British Columbia; Mercedes, who is attending the Portland Business College; and Raphael S., who is a student in the Behnke-Walker Business College of Portland. The mother of these children, who came to Oregon in 1858, taught the first school in her district. She is a native of Putnam county, Ohio, and has made her home in Josephine county, this state, since 1864 or for nearly a half century. She enjoys the warm regard and esteem of all who know her, the circle of her friends being almost coextensive with the circle of her acquaintances.

https://archive.org/stream/centennialhistor02gast#page/764/mode/1up
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Two children not yet linked to Lawrence and Mary Ellen Leonard:
*Lawrence John Leonard, b. 4 Feb. 1873, Josephine County, Oregon; d. after January 1920 and before March 1943.
*Francis Joseph "Frank" Leonard, b. 7 Nov. 1879, Althouse (Josephine County), Oregon; d. 12 April 1962, Orange County, Florida (was to be entombed in Massachusetts "at a later date.")