Family name Sitoy (Sitoy 
) , in the entire world, is quite a rare surname. The cognomen Sitoy is characteristic of Philippines, where it is quite a rare surname, Kuwait, where it is a rare surname, and Hong Kong. Measured by absolute frequency, this name is the most popular in Philippines, Saudi Arabia, and the United States. Much less frequently, Sitoy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sitoy | Indonesia, Saudi Arabia, Philippines, Hong Kong, United States |
| adelino sitoy Filipino lawyer, politician, and regional language advocate (b. 1936) |
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| lakambini sitoy Filipino writer, PH (b. 1969) |
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| natileigh sitoy Filipino actress, PH |
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Fe, Pepe, Raul, Roni, Roel, Rene, Reny, Rico, Rito, Risa, Paul, Ruby, Rudy, Ruel, Rufy, Ryan, Grae, Gina, Lina, Liza, Luis, Ruth, Cris, Aiza, Amie, Ana, Amy, Roy, Rey, Rex, Ruf, Gay, Leo, Luz, Jay, Ned, Eva, Mark, Maya, Mely, Meme, Alex, Alen, Alan, Alma, Anie, Jose, and John