Looking for any info on William Ross Brown Jr. b. May 1892 Alabama US to William Ross Brown and Anna McAuley.

WWI registration card on line at ancestry.com where he registered in Birmingham Alabama 1917 which states:

He has a wife and 2 yr old.
Works as a munitions worker at P. W. Ellis Co. Toronto
Born Selma AL
Served in Alabama National Guard

Any info appreciated.