Surname Ongtioco (Ongtioco 
) , around the world, is a very rare cognomen. The last name Ongtioco is habitual in Philippines, where it is a very rare surname, and Canada, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ongtioco | Canada, Philippines |
|
honesto flores ongtioco Filipino bishop, PH (b. 1948) |
|