I don't know where in Holland Trientje was from unfortunatly. All I know about her is her name, birth, marriage & death dates. A birth certificate for her son, was actually written 13 years after her son died - written by his sister listed her name & that she was from Holland. That is it. A researcher in Iowa found cemetery records with her birth & death dates recorded. She didn't appear to have an obit in the paper, neither did her husband who died 4 years before her.
Good luck and if I learn anything else, I will post it here. Thanks.