Surname Dumantay (Dumantay 
) , in the world, is a rare family name. The cognomen Dumantay is characteristic of Philippines, where it is a rare surname, Malaysia, where it is a very rare surname, and Canada, where it is an extremely rare surname. In absolute terms, it is the most numerous in Philippines, the United States, and Malaysia.
Rey, Edna, Erik, Emma, Maria, Mario, Minda, Micah, Myrna, Sixto, Alice, Alwen, Annel, Arman, Aurea, April, Bryan, Peter, Pedro, Ramon, Ramil, Rosie, Elma, Regie, Nida, Jhon, Ria, Leo, Lea, Marc, Mark, Aiza, Beto, Rosa, Rene, Ruiz, Rhea, Dory, Liza, Lita, Lito, John, Joan, Joel, Joey, Jovy, Juan, Tony, and Delia