Last name Ubac (Ubac 
) , in the world, is a rare family name. The cognomen Ubac is habitual in Philippines, where it is a rare surname, Venezuela, and France, where it is a very rare surname. Much less frequently, Ubac is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ubac | Spain, Philippines, France, Brazil, Venezuela |
| raoul ubac Belgian artist, active in France (1910-1985), FR (b. 1910) |
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| claire ubac French writer, FR (b. 1960) |
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| rafael ubac Roman Catholic bishop |
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Rey, Angel, Aries, April, Chloe, Cesar, Karla, Pavel, Peter, Pedro, Ramon, Randy, Rodel, Romeo, Roben, Roger, Daisy, Gemma, Glenn, Lorna, Lumar, Jaime, Allen, Allan, Alvin, Sonny, Rex, Gil, Eva, Mark, Mike, Aran, Bono, Raul, Rico, Riza, Jonah, Ruby, Glen, Lily, Luis, Jose, Ting, Nora, Edna, Maria, Minda, Simon, Rudy, and Jessa