A jovial and jaunty Irish name, the title of a long-gone TV crime drama, this would make an appealing choice. Slight downside: Maddy is already a mega-popular nickname for Madeline/Madelyn and Madison, so this Mad- name might not feel as distinctive as the stats would suggest.

An unusual, energetic surname choice that would make a good Madison alternative. Madigan was a typical police detective series of the 1970s, starring Richard Widmark.