Danena unknown Doane and Gertrude (Rowell) Doane, last lived Barnstable Co, Massachusetts

I have two big challenges here: unknown, Danena Lena. Everyone on Ancestry lists her as Lena Doane. Doane is her married name, Lena is the name she used. Her given name is Danena unknown. Born 1830 Canada, died 20 Feb 1979, Brewster. Married Herbert W Doane, born 1874 ,Barnstable, died 1943 Brewster. They had a daughter they adopted, I don't know if it was a legal adoption, Gertrude (Rowell?) Doane 1901 – 1987 birth place unknown, died Brewster. No children of their own. Gertrude never married or had children.
Does anyone have any ideas how to find out where Danena came from, her surname or info about Gertrude? Everyone is coping everyone on Ancestry and I'm trying to get the facts straight esp when the Doane Family is my family and I don't want nonsense on my family website for history reasons.
Thanks,
Spirit