Hi Darrell, since you created the profile for Mary Bennett, (changing her from the previous designation of Unknown) please add whatever you have. Information and especially sources for the information. The first thing you should address is why you think her maiden name was Bennett. Her husband's profile clearly states that her maiden name is unknown.
Please note that Ancestry, Family Search etc. are not sources themselves, they are repositories of Sources, but they also contain, family trees, which are notoriously inaccurate.
If you got the surname Bennett from family trees, you should change it back to Unknown.