Took me more than a year to realise why the wild swine is called Gregory peckary

I was listening to Studio Tan like any humorous, kind, selfless, humble , and attractive people do , then wondered who invented the calendar, after a moment of thinking i realised they actually did teach me this in school , it was a bloke named Gregory, we live by the Gregorian calendar. Only a few months later did I realise there's a connection