Surname Gerardus (Gerardus 
, Герард 
, جيرارد 
) , all around the world, is quite a rare family name. The last name Gerardus is habitual in Cyprus, where it is quite a rare surname, Hungary, and Spain, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Spain, Indonesia, and Sudan. More frequently, Gerardus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gerardus | Germany, Netherlands, Spain, Indonesia, South Africa |
| Герард | Kazakhstan, Ukraine, Belarus, Armenia, Russia |
| جيرارد | Iraq, Sudan, Saudi Arabia |
| Герардус | Ukraine, Russia |
Geert, Gellert, Gellért, Gerald, Gerallt, Gerard, Gerardo, Gerd, Gerhard, Gerhardt, Geri, Gerold, Gerrit, Gert, Giraldo, Girard, Gérald, Gérard, Гелерт, Геллерт, Геральд, Геррит, Герт, Герхард, Джеральд, Джерард, Джерард, Жерар, Джерардо, Жерар, Жеро, Херардо, ג'ראלד, ג'רארד, גרהרד, ז'ראר, جيرار, جيرالد, غيرت, เจอราร์ด, ジラード, 吉拉德, and 杰拉德
| gerardus, i duyckinck American limner, painter, and glassworker, US (b. 1695) |
|
Bos, Burgers, Labobar, Janssen, Juvastira, Hartman, Hatsanto, Hoetmer, Huismans, Vanrooij, Verdegaal, Yudhanto, Maheswara, Schlotter, Cieremans, Geerlings, Vanderham, Fernandez, Wilhelmus, Timmermans, Vanderwees, Westerhout, Bartels, Zetsen, Naaijkens, Doedee, Dam, Hol, Wit, Smit, Beuk, Krol, Rooy, Voss, Smith, Smits, Steenbakkers, Alvin, Groot, Leeuw, Joris, Noyen, Hurck, Mulder, Smeets, Cromsigt, Bakker, Peters, Dirks, and Van Der Zanden