Cognomen Пэй (Pae 
, Paay , Пэй 
) , all over the world, is quite a common family name. The last name Пэй is characteristic of Estonia, where it is quite a common surname, Lesotho, where it is quite a rare surname, and Myanmar. Not in comparison with a country's population, it is commonest in Myanmar, Indonesia, and the United States. Likewise, Пэй is the forename as well as the last name.