Worldwide, Герардус (Gerardus 
, Geradus 
, Герардус 
) is quite a common boy's given name. The forename Герардус is characteristic of Netherlands, where it is quite a rare masculine name, Indonesia, and Belgium, where it is a rare male name. Not in comparison with a country's population, it most frequently occurs in Indonesia, Netherlands, and South Africa. Much less frequently, Герардус is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Gerardus | Netherlands, Germany, Spain, Indonesia, South Africa |
| Geradus | Netherlands, Spain, Indonesia, South Africa, United States |
| Герардус | Russia, Ukraine |
Geert, Gellert, Gellért, Gerald, Gerallt, Gerard, Gerardo, Gerd, Gerhard, Gerhardt, Geri, Gerold, Gerrit, Gert, Giraldo, Girard, Gérald, Gérard, Herardus, Гелерт, Геллерт, Геральд, Геррит, Герт, Герхард, Джеральд, Джерард, Джерард, Жерар, Джерардо, Жерар, Жеро, Херардо, ג'ראלד, ג'רארד, גרהרד, ז'ראר, جيرار, جيرارد, جيرالد, غيرت, ジラード, 吉拉德, and 杰拉德