Around the globe, Ontog (Ontog 
) is a very rare boy's first name. The first name Ontog is habitual in South-eastern Asia, particularly Philippines, where it is a very rare masculine name. Much more prevalently, Ontog is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Ontog | United States, Philippines |
Jo, Jona, Jony, Joel, Jovy, Jean, Juan, Nilo, Nora, Noel, Nena, Eden, Edoc, Emma, Mario, Marla, Malyn, Mercy, Merle, Menda, Sandy, Silda, John, Susan, Jose, Lito, Ana, Pio, Rey, Rio, Leo, Joy, Ely, Eva, Ivy, Mary, Mark, Andy, Aida, Rene, Remy, Rudy, Ruel, Ryan, Lany, Ledy, Lily, Lupu, and Alden