A girl called Henry named Henrietta...

Out of many female names you can create other, male names that could make a creative and unique nickname choice.
  1. Alex
    • Origin:

      Diminutive of Alexandra or Alexis
    • Meaning:

      "defending men"
    • Description:

      One of the most evenly divided unisex names these days; strong and energetic, if overused, for both genders.
  2. Bill/Billie
    • Charlie
      • Origin:

        Diminutive of Charles or Charlotte
      • Meaning:

        "free man"
      • Description:

        Charlie is one of the friendly, tomboyish male nickname names--another is Sam-- now used almost as frequently for girls: in 2015, it ranked higher on the girls list than on the boys list for the first time. That makes Charlie one of the most popular unisex names around today. The name Charlie, for females, has been jumping up the charts since it reappeared, after a 50-year hibernation, in 2005.
    • Erik
      • Fred
        • George
          • Henry
            • Leo
              • Louis
                • Rick
                  • Will