- Born: 28 Dec 1867, Regan's Lag Broughtonworth Burrowa, New South Wales
- Christened: 1 Jul 1871
- Marriage: Maria Norrie on 17 Dec 1894 in Armidale, New South Wales
- Died: 7 Aug 1951, Ch Of E Cemetery, Adamstown, New South Wales at age 83
- Buried: 10 Aug 1951, Werris Creek.
Winthorpe married Maria Norrie, daughter of William Norrie and Catherine Gurr, on 17 Dec 1894 in Armidale, New South Wales. (Maria Norrie was born on 6 Mar 1872 in Blackdown, Bathurst, Victoria, died on 13 Oct 1946 and was buried in Werris Creek, New South Wales.)