Family name Monrat (มลรัตน์ 
, มนรัตน์ , Monrat 
) , globally, is a rare cognomen. The last name Monrat is characteristic of Thailand, where it is a rare surname, France, where it is a very rare surname, and Chile, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Thailand, France, and China. More frequently, Monrat is the forename as well as the last name.