Pei
Pei is primarily a Chinese surname, most commonly romanized from the character 裴 (péi). It is also encountered as a given-name element in some East Asian naming traditions. The surname is present among Chinese communities around the world and has several variant spellings in different dialects and historical transliterations.
The most internationally known bearer of the name is Ieoh Ming Pei, usually written as I. M.
Outside of personal names, the uppercase abbreviation PEI is used for Prince Edward Island, a Canadian province.