Well actually since Hagamoro and Hamura are brothers everyone descended from both are related to each other so no use debating that point lol
You would be happy with that?
All clans coming from Kaguya?
Given that you like to think , like me , that Hagoromo is the ancestor of only 2 clans , that makes a lot of work for Hamura , don't you think?
Take all the ninja , put the Senju clan and the Uchiha clan in a corner , all the diversity of ninjas that is in the main group would once have been in Hamura's blood?
Ero-Hamura of the 6 wifes?
In my theory , Kaguya would be the ancestor of a few clans , Senju , Uchiha , Hyuga and maybe few others.
The majority of the ancestors of all the clans in the world would be simple humans that became friend with Hagoromo during his trip.
Hagoromo gave them the ability to use ninshuu , each time he gives the ability , one clan is created.