Good to hear from you! Many of the names you've listed sound familiar to me but it was my mother Inez who maintained the family tree. She has volumes of information I've yet to sort through. We had wondered about the Inez Erdahl who married Oscar Isaacson so thank you for that information.
My mother's parents were Anna Sophia Olson and Samuel Samulsen (?) Erdahl, son of Sam Erdahl and Hanna (?). I don't know much about them but do have a great photo of them with all their children. My grandfather Sam was the oldest and had a marriage previous to my grandmother Anna and they had 4 children.
I apologize for such spotty information at this time. I intend to sort through mother's records and get back to you with more detailed information.
Feel free to contact me at my private email: email@example.com.