Cognomen Siase (Siase 
) , around the world, is a rare family name. The family name Siase is habitual in Philippines, where it is a rare surname, and South Africa, where it is a very rare surname. Much less frequently, Siase is the forename as well as the last name.
Fe, Marissa, Merlisa, Sharlyn, Silvano, Angelie, Antonio, Betbeth, Geramie, Genalyn, Leolito, Lisfrel, Lorgina, Japheth, Jeralyn, Jerafil, Julieta, Tresita, Ntsoaki, Eulalio, Francis, Marciano, Evelyn, Jerome, Jessie, Lemuel, Mash, Rose, Juan, Maria, Mhera, Aleja, Abeth, Romeo, Riche, Jesus, Ma. Gina, Jemar, Marife, Merlie, Arturo, Rafael, Rowena, Rofina, Rofino, Richel, Richie, Glenda, Felix, and Severino