Heh, yeah, that could be it too.
I remember talking about this before though, Jerry was such an idiot that he paid $160 to legally change his last name while he was engaged to Lizzy, while he could have changed his last name for free after their marriage in a process that would have been completely reversible in the event of a split. Either he didn't know this was an option, or he loved Lizzy so much that he thought it'd be worth it to drop $160 to take her last name anyway, probably because he didn't forsee her breaking up with him.
...Or maybe Jerry was so delusional that he thought he lived in Quebec, where the naming rules are kinda finicky. But Nova Scotia isn't Quebec
Really casts doubt on the whole "I hated Lizzy so much, she was so abusive" thing, doesn't it?