Heh, when did someone say we say Zoro's mom and dad?
But that aside, I suppose the biggest discussion, if anything, are Nami's biological parents, in light of her vivre card describing her as having been found at a kingdom. I still don't know if her parents were nobles or anything, or if she was even born there though.
Thanks, my mistake, Zoro's Sensei, not his parents, is a big name from Wano. So his parentage is open as well.
Being a foundling in a war zone Nami always struck me as having important parents. My thought was maybe a World Noble? They wear the bubble suits to keep separate from the atmosphere & Nami has a high affinity with the weather, could be the two things are related (but this is just a notion, of course).