Only the Zante currants (which is not a true currant) are from grapes. There are several berry plants, not related to grapes except that they are "plants," such as black currants, red currants and white currants. That being said, most of the "currants" that I see in the stores are Zante currants.
Trying to reason with a woman is like reading those software agreements you see online. You just go through them quickly and hit, "I agree." Rocky