Globally, Sumlay (Sumlay 
) is a very rare boy's forename. The given name Sumlay is habitual in South-eastern Asia, particularly Philippines, where it is a very rare masculine name. Much more prevalently, Sumlay is the last name as well as the forename.
Abo, Sarah, Sapia, Supia, Anwar, Amina, Bryan, Katak, Raida, Ribon, Datun, Jerry, Tayan, Norma, Noria, Esnia, Endal, Fahad, Oging, Udtag, Mariam, Marlou, Mizon, Mendi, Mamot, Malic, Abe, Ben, Bra, Mama, Melo, Mike, Said, Akob, Aisa, Aiza, Morato, Ayao, Jony, Joel, Tato, Taha, Tony, Toto, Omar, Usop, Mangi, Malay, Dhen, and Mosaib