Robert L "Butch" SinclairSinclair familyProbable how we know thisFamilyFatherRobert Joseph Sinclair (1910 to 1981)MotherRuby Marie Chance Sinclair (1910 to 1995)SourcesFindAGrave memorialView Robert L "Butch" Sinclair's family tree · See this person in the family network · Find how you are related