Cognomen Otagan (Otagan 
) , around the globe, is a rare surname. The surname Otagan is habitual in Philippines, where it is a rare surname, Canada, where it is an extremely rare surname, and the United States. Measured by absolute frequency, it is the most numerous in Philippines, the United States, and India.
Mark, Moises, Alicia, Aldrin, Aljoen, Carlos, Benjie, Robert, Ronald, Delfin, Gerald, George, Gelmar, Gloria, Lucita, Janeth, Joseph, Jovita, Julito, Ermila, Evelyn, Isidra, Maxima, Marven, Marlyn, Irene, Milo, Alma, Riva, Rhio, Ryan, Joel, Jojo, Nora, Elma, Edna, Mariano, Emma, Mario, Allan, Ariel, Arlyn, Agnes, Roliv, Jenny, Felix, Felly, Felma, Yoyo, and Marilou