Sylvia Cahill from Sims 3 University is in my family tree as George Cahill's wife and mother of Erwin Pries. (I headcanon her maiden name to be Pries). I never played her, however, I don't even have University, I just browsed Sims Wiki for familiar surnames.
Erin Kennedy was in my very first Sims 4 save. She married Tank Grunt and they had three children.
Vanessa Chen, Trent, Patricia and Tina Traveller from Sims 2 Vacations, Natasha Una and John Mole from Sims 2 Freetime also made the occasional appearance, but nothing major. Vanessa owes her role the fact that one of my man sims is named Tina Chen. The other five are among my favs in Sims 2.
