Mary Edwards actually born Mary Priaulx?

Edwards/Oliver family tree on Ancestry.com has Samuel Edwards married to Mary (or Maria) Priaulx, not Mary Green. Says she died in Grey Lynn, 21st August 1953. She was adopted by Henry Green, which explains the name change. Birth parents are John Priaulx b 1834, and Mary Powell b 1838 d 1870. She was the third of four children.