Speculation: What if the Merrills of Clan Snow Raven were a mother and her daughter or son? We don't have any info to go on, and the history on many points regarding the Snow Ravens is canonically unclear due to conflicting sources. ("Clan History" as we know it from all the various volumes, vs Betrayal of Ideals, and of course, the Wars of Reaving.
Then the Wards, Jal and Franklin. They are not separate Bloodnames, but something happened along the line. Jal is listed as the founder in Klondike, Franklin Ward is fighting in the Pentagon Worlds and seems to be a young buck who had a hard time with integrating Clan Doctrine - or he just liked to be a #^%#* to Jade Falcons. Either way, those are the two I wonder about most. There must be others.