Richmond started out as Pleasantview, until I moved in a CAS family who completely took over the story.... Most of my current playable sims are descended from this family. I'll list them here as a way of explaining who is descended from which branch of the family and where some of the names come from.
James Green had a son, Chris. Chris married Helen.
Chris and Helen Green had 5 children, Becky, Jamie, Gretchen (a), Ben and Serder (a).
Becky married Ashley Pitts. Children: Ashley and Jami (twins), Helen Cooke, Grace Gold. After Ashley died, Becky remarried to Joe Graham.
Descendants - Pitts, Cooke, Gold, and London families.
Jamie married Sarah. Children: Luke and Jenna. They divorced and Jamie remarried to Mary Sue Pleasant. Children: Susan.
Descendants - Green and Roseland families
Gretchen married Orlando Centowski. Children: James, Kyle, Douglas (a), Ruth Cadey, April Bertino, Sheila (a) Ruben. After Gretchen died, Orlando remarried to Nancy McBride.
Descendants - Centowski, Cadey, Bertino, Ruben, Bonaccord, Beare, Kauffmann, Green, Jung families (yeah, there's a lot of them!)
Ben married Marisa. Children: Jamie and Alvin (a).
Descendents - Green families
Serder married April Hutchins. Children: Cory, Chris and Aaron (twins). Serder remarried to Brandi Broke. Children: Helen.
Descendents - Green and Deppiesse families