William M Falkner was born on October 1, 1821 in Tennessee to Jonathan Falkner and Matilda VanBuren.

He was the father of Melissa Falkner and four additional unidentified children.

He died on April 7, 1859 in Wyatte, Mississippi

William Falkner is mentioned as the son of Jonathan Falkner in the Last Will and Testament of Jonathan Falkner.