Surname Cajan (Cajan 
) , across the world, is quite a rare cognomen. The surname Cajan is characteristic of Czechia, where it is quite a rare surname, Peru, and Philippines. Much less frequently, Cajan is the forename as well as the last name.
| alexander cajan FI (b. 1767) |
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| johan cajan Finnish historian, FI (b. 1815) |
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