Cognomen Sicao (Sicao 
) , in the entire world, is a rare surname. The surname Sicao is characteristic of South-eastern Asia, particularly Philippines, where it is a rare surname.
Li, Jerry, Norma, Elisa, Edwin, Efren, Fidel, Morino, Merlyn, Medina, Alecia, Albert, Analie, Analyn, Angelo, Bender, Pandia, Racman, Raquel, Rosana, Regina, Divina, Lydia, Lorna, Delia, Rolan, Roy, Lea, Roel, Rini, Ruel, Gina, Joel, Juny, Tony, Noel, Leizel, Eric, Mario, Mercy, Myrna, Sisoy, Anita, Arnel, Ambis, Adday, Ramie, Rodel, Maria, and Lodino