1) No, calypso and reggae do not both come from Jamaica. Calypso originated in Trinidad decades before the evolution of reggae.

2) What do you mean by "western ear"? Last time I checked, both Jamaica and Trinidad were part of the Western Hemisphere. Or do you equate "western" with "white"? If so, you are a racist.

I would add, that even if calypso and reggae had come from the same place, equating them as the same music would be stupid. Or are you the guy who thinks that that rap and bluegrass are the same because they both developed in the United States?