Given his name, his age and his abilities, is it possible that Mr Am is supposed to be some iteration of God?
In the Catholic tradition, the words "I am" are a translation of the Hebrew name of God, as mentioned in Exodus when Moses asks God what his name is 'I am "I am"'.
I believe the original Hebrew phrase is more along the lines of his name being "I am that I am" or "I am what I am", which is just asking for Popeye as God, or possibly a Gloria Gaynor reference...