Frommer- +‎queen.

merqueen (pluralmerqueens)

1. Amermaid, especially one who is aqueen.
   • 2006, Lunar-k,Angels, Fairies, Mermaids & Warriors:

     Have you ever met any from the sea clanMerqueen and Saxon merman[…]

   • 2009, Clark Smith, Patricia Clark Smith,Baiting Hollow: A Time of Enchantment:

     Then Brigit followed singing: Themerqueen picks the dolphin, Themerqueen picks the dolphin, High, ho, the dario, Themerqueen picks the dolphin.