Roy John SinnettSinnett family✓Confirmed how we know thisFamilyFatherW. G. Sinnett (born 1909)MotherCatherine R. Sinnott (born O'Neill) (1909 to 1991)Sources1940, ED 68-19, p.11, line 45View Roy John Sinnett's family tree · See this person in the family network · Find how you are related