I tried a few Mudcat names [and a few famous ones] just now, and here's what I came up with:

Jeanene [my name] became "Guanine"
Amos Jessup became "Amok Jesus"
Sorcha became "Sortie"
Pene Azul became "Pee Azalea"
Mark Cohen became "Mark Coven"
Kendall became "kindle," "kneaded," or "candela"
Bob Dylan became "Bob Delay"
Joan Baez became "Joan Baize"
MMario became "Marie"
Susan Hinton, spellcheck changed you to "Susan Hilton" (You're rich, girl!)
spellcheck didn't know what to do with "dharmabum," "Katlaughing" or "WYSIWYG!"

Genie