Family name Oasan (Oasan 
) , around the world, is a rare surname. The family name Oasan is characteristic of Philippines, where it is a rare surname, Singapore, and the United States, where it is an extremely rare surname. Very seldom, Oasan is the forename as well as the last name.
Mae, Lucia, Timmy, Nilia, Novie, Efren, Henry, Honey, Fruto, Irene, Olnia, Oscar, Marina, Marvin, Maluza, Maxima, Albert, Aldrin, Angelo, Ayessa, Cherry, Philip, Louie, Rachel, Ruben, Karen, Ann, Rey, Luz, Jon, Tim, Val, Mary, Mila, Alex, Rhea, Leah, Joel, Juan, Ella, Eden, Edna, Maria, Madel, Alvin, Alfie, Aljon, Kyran, and Regina