Benson to Gloria
5 connections
Benson
Soap
Soap's Benson DuBois spunoff on to his own show, Benson
Hanging In
Maggie Gallagher from Hanging In crossed over onto Soap
Maude
Hanging In (and Maude's) Maggie Gallagher crossed over onto Soap for 10 episode
All in the Family
The first All in the Family spinoff character was Maude. Maude was Edith Bunker's cousin.
Gloria
Hope and Gloria's title characters visited Friends' Central Perk.