Surname Моллой (Molloy 
, Моллой 
) , all over the world, is a common family name. The last name Моллой is characteristic of Northern Europe, particularly Ireland, where it is a common surname, Jersey, where it is quite a common surname, and Isle of Man (explore the name in all countries). Measured by absolute frequency, this name is the most popular in the United States, the United Kingdom, and Ireland.