Is there a term for expressions usually rendered as names but are meant to be humorous?

The expressions about which I am asking are used often on "Prairie Home Companion" when the narrator delivers a list of "fake" credits at the end of the show or at the end of a comic bit.

For example, I.P. Freely, Iona Ford, Ilene Down, Max A Million, etc. Is there a technical term for this type of expression. I guess these could be a type of pun.


These are indeed puns. You could also call them double entendres, pun names or gag names.