My family tree - Can someone find the parents to one of my ancestors

@RoseBretz

Very doubtful you'll get much help when providing such vague information. If you've found Mary Monson, at the very least you must have a country of birth (hopefully, a general area within it, too) and a rough time-period: even a century would help.

I'm sure a number of "Community" participants would be only too willing to provide advice, but please provide a little more detail about Mary Monson first.

However, if you go to the page at https://www.familysearch.org/search/tree/results?q.givenName=mary&q.givenName.exact=on&q.surname=monson&q.surname.exact=on you will find a number of individuals of that name included in Family Tree (some with parents added, too). Perhaps one of these might be "your" Mary?