Try St. Josephs Catholic CHurch in Trenton. St. Joe's is the oldest Church in Trenton. I would suggest to also try Mout Carmel Catholic Church in Wynodotte. Some of the people from Trenton also attended this Church too, it too is one of the oldest in the area. The cemetery that was suggested is a newer cemetery in the area. So one of the Churches would be able to suggest a cemetery that is older. As I remember Michigan Memorial Cemetery has many Catholic persons buried there, it is an older cemetery. They may have a website but do a google search. I was a resident of Trenton for over 30 years so I hope this helps.