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 1803
From History of Coshocton County, Ohio: its past and present, 1740-1881. Containing a comprehensive history of Ohio; a complete history of Coshocton County ... a history of its soldiers in the late war ... (1881)
BOYD WILLIAM M., Keene township; born March 13, 1803, in Pennsylvania; a son of Robert Boyd, who was born September 6, 1769, died November 28, 1826, and Mary McMaster, born August 27, 1779, died January 23, 1872, and grandson of William Boyd and James McMaster. Mr. Boyd came to Jefferson county in 1803, and remained there till 1814, when he came to Coshocton county to the farm where he now lives. He has traveled considerably in the United States, and was married to Miss Bowl, April 1, 1824, who was born April 12, 1804, died September 3, 1873, a daughter of James and Nancy (Thompson) Bowl. Their children were: Nancy, born February 11, 1825; Gilbert, February 11, 1826, died January 21, 1849; Mary, born April 12, 1831; Robert, September 10, 1833; Sarah, June 28, 1836, and John C., February 25, 1841, died December 25, 1852.
As printed in History of Coshocton County, Ohio: its past and present, 1740-1881. Containing a comprehensive history of Ohio; a complete history of Coshocton County ... a history of its soldiers in the late war ... (1881). See the original pages. Wording is the original; obvious scanning errors have been corrected, and a few may remain.
Their biographies name William M. Boyd: William B. Elliott (b. 1825)
The printed record stops around 1881. We trace your line from there down to you, with every source cited.