William L. Kenly was born on February 18, 1864, in
Baltimore, Maryland, the son of Major William L. Kenly and Marion Hook. His father participated in the
American Civil War. His immigrant ancestor was his great great grandfather Rev. Daniel Kenly who emigrated from Scotland to Maryland in the 1700s.{{cite book|last=Davis|first=Henry Blaine Jr.|title=Generals in Khaki|publisher=Pentland Press, Inc.|year= 1998 ==Military career ==