Surname Kristjan (Kristjan 
, كريستيان 
, クリスチャン 
, along with others...) , globally, is a rare last name. The last name Kristjan is characteristic of Iceland, where it is quite a rare surname, Albania, and Estonia. Not in comparison with a country's population, it is commonest in Japan, Albania, and Slovenia. More prevalently, Kristjan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kristjan | Greece, Estonia, Albania, Iceland, Slovenia |
| كريستيان | Morocco, Iraq, Syria, Lebanon, Algeria |
| クリスチャン | Japan |
| Кристьян | Kazakhstan, Russia, Ukraine |
| 克里斯蒂安 | China |
Christiaan, Christian, Christianus, Chrystian, Cristen, Cristhian, Cristian, Cristiano, Cristián, Kristian, Kristiano, Kristijan, Kristián, Kristiāns, Kristjàn, Kristján, Krisztian, Krisztián, Krystian, Risto, Κριστιάν, Кристиан, Кристиано, Кристиян, Кристйан, Кристян, Криштиану, Крістян, Крістіан, Христиан, Християн, Хрістіан, כריסטיאן, คริสเตียน, Ḵristján, and クリスティアン
Saar, Prifti, Prendi, Prenga, Poljak, Pjetri, Lleshi, Haxhia, Mejdani, Arnason, Simoni, Jonsson, Einarsson, Olafsson, Magnusson, Stefansson, Halldorsson, Sigurdsson, Kristjansson, Gunnarsson, Thordarson, Peterson, Gudmundsson, Ndoca, Gjoka, Sepp, Karu, Kask, Kola, Kull, Kukk, Pica, Ruci, Tamm, Gjini, Toma, Nano, Nika, Ndou, Ndoj, Marku, Sufaj, Allik, Robam, Gjoni, Tena, and Johannesson