I don't know about Columbus in particular, but most famous people like him have people from different countries continuously edit warring over which country gets to "claim" him. I'll check the talk page ... yep, half the talk is arguing about this.

(As an American, I find this phenomenon extremely silly and very foreign feeling. I don't really care whether "my" ancestors get credit for something or not, especially given that national boundaries and people move around all the time. I find it vaguely nationalistic in the ugly sense. Maybe it's because there were plenty of great Americans who were clearly not born here in the first place?)