I show thatWilliam and Fanny were m. Bef. 1873 inMississippi.
Thus its possible that they could have had a son b. abt. 1875.
Neosha County looks like a probable birth location, sinceWilliam was born there.
By the time Alvin was b. in 1891,in Brazos County, Texas,an older brother, a Leonard,born in 1875,would have been about sixteen years of age and old enough to have left the family homestead and started a life of his own.