Last name জয়দেব (Jaydev 
, Jaidev 
, Jayadewa 
) , around the world, is quite a rare surname. The cognomen জয়দেব is characteristic of Sri Lanka, where it is quite a rare surname, Singapore, where it is a rare surname, and Portugal, where it is a very rare surname. In absolute terms, it is commonest in Sri Lanka, India, and the United States. Much more prevalently, জয়দেব is the forename as well as the last name.