Our William was a brother to my husband's gg grandmother, Isabel Beard, who married Timothy Lee. In 1860 he was still living with his mother, Lucy, in Coryell Co. Tex.,( 18 yrs. old). He served in the 10th Texas Infantry, Co. H. Then(according to the pension application I mention below) he served with his brother, Alex, in Co. I, 17th Regiment. I have a copy of Alexander Beard's wife's Pension application on which William was a witness. In 1899 William listed his address as Santa Paula California and his age as 57. I haven't found him on the census yet to see who his wife and children were.On the pension application, he said that he hadn't seen Alexander's wife since 1870, and only knew of her through letters since then. Does any of this fit your William?