Help!! My husband is a III(third)

Jaime

My husband is a III, of course he wants to keep family tradition and I’m willing to accept lol BUT he insists it’ll be IV. The I and II generations have passed.... does that make him then a senior and my little become a junior?? I’m confused as to he doesn’t want a junior he wants a IV. He wants it to be known there’s four of them🤣🙄 please help with your thoughts thank you in advance!!