Marky. Or Marky Mark, but only if you call the rest of your children “The Funky Bunch.”
Famous people named Mark:
Author Mark Twain; Facebook founder Mark Zuckerberg; dancer Mark Ballas; actors Mark Hamill, Mark Harmon, and Mark Ruffalo.
Mark Twain (real name: Samuel Clemens) took his pen name from a riverboating term used to indicate a depth of two fathoms.