Do we know of any of Roronoa Zoro's family? I was watching some AMVs on youtube and one of them mentioned the tragic familial backstory each character has: for Luffy it was Ace, Sabo, Dragon, Garp, and Shanks; for Usopp it was Yasopp, Banchina, and Kaya; and for Nami it was Bell-mère and Nojiko. Zoro is the only member of the Pre-Grandline crew that we know nothing (to my knowledge) of his family except for Koshiro and Kuina (they were the only thing close that I could think of).

Was there ever anything mentioned about Zoro's family?
Nothing has ever been shown of Zoro's family, and he has never mentioned them. We know from his flashback that he trained in Kuina's father's dojo from a reasonably young age, and that even before that he traveled around as a reasonably good swordsman.

There's a chance he might have family on Wano Kuni, but I think it's unlikely. We don't know if he knows his family, or if he grew up as an orphan, but he has been without a family for a long time now.