Across the world, Catja (Catja 
) is a rare feminine first name. The given name Catja is habitual in Denmark, where it is a rare female name, Sweden, and Germany. In absolute terms, this name is the most popular in Germany, Italy, and Sweden. Much less frequently, Catja is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Catja | Germany, Sweden, Netherlands, Italy, Denmark |
| catja görna German actress and voice actress, DE (b. 1922) |
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| catja rauschenbach CH (b. 1949) |
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| catja bertiaux performing artist in Canada |
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| catja donner DE |
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Ko, Wijnen, Wolter, Mantere, Moeller, Carrell, Baumann, Boghammar, Brandes, Karlson, Duschak, Gilaard, Nazarri, Naedele, Nielsen, Eppinga, Huijsen, Andersen, Cardinal, Pedersen, Dijkstra, Versteeg, Olesen, Forkel, Hansen, Jensen, Amo, Rijk, Lodi, Tang, Caroc, Bosch, Keuch, Gylov, Hafer, Fritz, Rasmussen, Mahnke, Moskal, Andreu, Arnzen, Cappon, Koster, Peters, Prykop, Draper, Gibson, Larsen, Morris, and Christensen