Cognomen Onciul (Onciul 
) , in all the world, is a rare family name. The cognomen Onciul is habitual in Romania, where it is quite a rare surname, Canada, where it is a rare surname, and New Zealand. In absolute terms, this name is the most popular in Romania, Canada, and Belgium. Very seldom, Onciul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onciul | Germany, Belgium, Canada, New Zealand, Romania |
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dimitrie onciul Romanian historian (1856-1923), RO (b. 1856) |
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aurel onciul Romanian politician, RO (b. 1864) |
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| isidor onciul UA (b. 1834) |
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| sebastian onciul researcher |
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Mr, Raluca, Roxana, Dalene, Dianne, Dragos, Gerald, Joanne, Bogdan, Tanner, Victor, Manoela, Matthew, Mihaela, Decebal, Lacrima, Cristian, Harvey, Cheryl, Adrian, Amelia, Ms, Pam, Rob, Dan, Tim, Anca, Kyle, Dean, Olea, Maria, Steve, Andru, Diana, Tammy, Ioana, Sharon, Andrew, Dimitrie, and Alexandru