MikeLigalig.com

The famous “three kings” from the Biblical birth of Christ narrative weren’t:

1. Three in number (the number isn’t mentioned at all).
2. Kings (they were “wise” men) â€" this probably comes from Psalm 71:11 (72:11 in protestant bibles): “And all kings of the earth shall adore him: all nations shall serve him.”
3. Trotting about on camels.

The actual narrative (Matthew 2:1â€"2) merely says: “When Jesus therefore was born in Bethlehem of Juda, in the days of king Herod, behold, there came wise men from the east to Jerusalem.” It says a little later that they offered Him gifts of “gold, frankincense, and myrrh” â€" but that is about as specific as it gets. -- http://listverse.com/

so when did the term "three kings" come about, and who started it?