Genealogy-how can I locate a female relative who has probably changed names through marriage?

Question

last information on this relative was from 1975. I have a full name, birthdate and names of parents, parents birthdates and death dates.

Answer 1

With the parents' death dates you should be able to find out where they were buried. The cemetery might have updated contact information.

Answer 2

Check marriage records. If you know she is still living, you could possibly check the white pages.