Saint Patrick may have not been Irish, but millions of other people are. According to the travel resource WalletHub and the most recent U.S. Census Bureau data, 33.3 million people in the United States claim Irish ancestry. That's around seven times greater than the entire population of Ireland. The first St. Patrick's Day parade took place in Boston in 1737, and New York City's St. Patrick's Day Parade is perhaps the largest and best-known parade for Saint Patrick. What's more, Saint Patrick's given name wasn't Patrick. His "real" (Brythonic) name was Maewyn Succat, according to Irish legend. But Maewyn Succat Day just doesn't have the same ring to it as St. Patrick's Day.