The only others of James Marshall's children I have information on are Nancy and Hezekiah. Since I posted the query I havent found anything else out about Rebecca and Abraham Cane/Cain.
James and Mary Marshall had another daughter Mary who married a Doud/Dowd. I have no names for their brother Eli's children and brother James Jr. I have single son's name, George W.Marshall, but there were more.
I havent had a lot of time to work on this but now you have inspired me to work some more on the Marshall family.