Surname เพ็ญเกตุ (Penket 
, เพ็ญเกตุ 
) , worldwide, is a very rare last name. The surname เพ็ญเกตุ is characteristic of Thailand, where it is a very rare surname, and France, where it is an extremely rare surname. Much less frequently, เพ็ญเกตุ is the forename as well as the last name.