[quote="SummerSmiles, post:7, topic:225066"]
I think you may be on to something here. When both of my children were baptized, my maiden name was put on their birth certificates. I was a bit surprised, but I didn't think much of it. I think that they might do it for record keeping purposes. That way all of "Sue Jones" paperwork is under the same name, rather than some of it being under "Sue Brown," for example.
It's a way of keeping bloodlines clear too.
Think about how often historical parish registers are used for genealogy research. Recording the mother's maiden name is important to keep families straight. In small communities, particularly, there could be several children with the same given & surnames. Some could even have moms & dads with the same given names. Throw in the mother's maiden name and you have a much clearer view of the family picture.