octuple-fourth-cousin
A person who shares no parents, no grandparents, no great-grandparents, no great-great-grandparents, and sixteen great-great-great-grandparents with someone else. Basically, you're related by blood but you're also a total mess.
My uncle's uncle's uncle's uncle's uncle's uncle's uncle's uncle is my octuple-fourth-cousin. And I still don’t know why.
My octuple-fourth-cousin showed up at the family reunion and I didn’t even recognize them. They looked like a stranger.
I asked my octuple-fourth-cousin if they were related to me and they said, 'We’re all related, but I’m the one who’s actually here.'