I have been completely unable to find the name of even one of these clans - or even what kind of name they could be expected to have (something prosaic like "Nakamura clan"? Or dramatic like "Clan of the Red Dragon"? Or pseudo-traditonal like "Heroic Samurai of Ginza"?).
All my googling has led to nothing - everyone seems to be copying everyone else here, and persistently speaks of sub-clans, but never names any of them.
If anyone knows names of sub-clans of the other yakuza families, that would also be helpful - I could extrapolate...