Forum:Anri's Lineage

Alright, I'm mildly confused. Cornelius and Marth are supposed to be the descendants of Anri. However, Anri never married because his beloved Artemis married Cartas -- and he apparently didn't have any heirs because his brother Marcelus took the throne of Altea when he died.

I'm sure you can predict my question, but I'll go ahead and type it out: how can Anri have descendants if he didn't have kids? I mean, at best, wouldn't Marth and Cornelius be descendants of Anri's father? They'd share a common ancestor (if you can call a father an ancestor), but Anri couldn't have direct descendants without kids, right?