It is just a mangling of "John" that only exists in English. It's just that that site is so crap that they couldn't clearly communicate that "Jhon" is a mangled variant of "John" and that "John" comes from Hebrew through Greek and Latin. Name sites aren't really the most reliable sites on the web after all.Apparently that's a legit spelling of Hebrew origin... who knew.You must be registered to see the links
(And, yeah, I've often thought it was just a careless typo when seen before. Got curious this time, tho'.)