Michael or Micheal

On the envelope containing the $20,000, the spelling of the title character is "Micheal".
I looked it up since it was listed as a typo:

Mícheál is actually the Irish form of Michael while Mìcheal is the Scottish equivalent. In the Gaelic tongue, the ?ae? is flipped to ?ea? and is pronounced MEE-haul or MEE-hale. As it turns out, Micheal is a correct spelling of the name!