Ok. So my father had 6 siblings. On everyones tombstones it says Campbell. On half of their marrage records and the marrage record of my father, it says their last name is "Campbell". The other half and my grandfathers marrage records say "Duhamel". I know these are my aunts and uncles because all the other information including the spouse is correct. Most of these people have long passed and we have not heard of any name change. Anybody have ideas to figure this out?