He married
Mary K. M. (?).
William was born at
Chester Co., South Carolina, on 21 May 1810. He was the son of
Alexander Rosborough Jr. and
Mary Hemphill. He married
Martha Mary Moffatt at
Chester Co., South Carolina, on 23 August 1849. William was listed as the head of a family on the 1850 Census at
Chester Co., South Carolina. 1850 South Carolina, Chester Co. lists the following family: W.A. Roseborough, age 39, born in South Carolina; Martha Roseborough, age 23, born in South Carolina; James A. Roseborough, age 14, born in South Carolina.. William died on 7 January 1869 at
Chester Co., South Carolina, at age 58.