Surname Мандей (Monday 
, Munday , Мандей 
) , around the world, is a widespread family name. The surname Мандей is characteristic of Nigeria, where it is a common surname, Reunion, where it is quite a common surname, and the United Kingdom, where it is quite a rare surname. In absolute terms, it is the most numerous in Nigeria, the United States, and the United Kingdom. Also, Мандей is the forename as well as the last name.