I think those names are pretty ok compared to the rest... they have an Italian feel to it
There were the three brothers of Into, Inpah, and Illeto that formed the main family in the Opposition Clan. There were more than a hundred branch families without any blood ties to the main family. But, they were still part of the same Clan.
I would say the difference is pretty big since he's being Marcus more and more as time goes on, I still recommend the novel if you still want to give it a try
I really hope this doesn't turn into a harem... Come on, Marcus already got his romance and male protagonist having a female friend is almost impossible, I know it but I still have hope that the author won't go with this annoying cliche.