Biden later returned to school for her doctoral degree, studying under her birth name, Jill Jacobs.[35] In January 2007, at age 55, she received a Doctor of Education (Ed.D.) in educational leadership from the University of Delaware.[1][44][45][46] Her dissertation, Student Retention at the Community College: Meeting Students' Needs, was published under the name Jill Jacobs-Biden.[45]
https://en.wikipedia.org/wiki/Jill_Biden?