Thread:Ninja72/@comment-7180588-20180919172207/@comment-26537965-20180919173136

Well, maybe he was just assuming. There is even a section on her talk page about that. (not about him calling her that in the comics, about how the page was called Marceline Abadeer and had no source for that surname) https://adventuretime.wikia.com/wiki/Talk:Marceline#Abadeer