In the book's own words, not ours, with obvious scanning errors fixed. Families often supplied these stories to the publisher, so check key dates.
Born 1808
From History of Crawford County and Ohio : containing a history of the state of Ohio, from its earliest settlement to the present time ... a history of Crawford County ... biographical sketches, portraits (1881)
WILLIAM KERR, farmer; P. O. Bucyrus; was born Aug. 24, 1808, and is the son of William and Sarah (Abraham) Kerr, and is of Welsh-Irish descent. In the fall of 1832, in company with a colony of twenty-one, he removed to this State and settled in Whetstone Township, near the Plains. He lived here until 1877, when he removed to his present home. He was married, Feb. 14, 1838, to Miss Jane Clark, of Whetstone Township. This union was blessed with nine children, Archibald, Ann, Alexander E., Nancy, Elizabeth, Sophia, Jane, Margaret, and a son who died in infancy. Those living are all married, and doing well. Archibald entered Co. K, 81st O. V. I., in the fall of 1862, under May. W. H. Chamberlain, and died at Corinth, Miss., of a fever, Dec. 1, 1862, aged 24 years 9 months and 25 days. Mr. Kerr has made his property by hard labor and frugality, and is now in comfortable circumstances. He and his wife are both members of the Presbyterian Church of Bucyrus, and have been so for twenty-five years.
As printed in History of Crawford County and Ohio : containing a history of the state of Ohio, from its earliest settlement to the present time ... a history of Crawford County ... biographical sketches, portraits (1881). See the original pages. Wording is the original; obvious scanning errors have been corrected, and a few may remain.
Their biographies name William Kerr: Robert W. Kerr (b. 1872) Alexander M. Kerr (b. 1846)
The printed record stops around 1881. We trace your line from there down to you, with every source cited.