Surname Janchen (Janchen 
, Янчен 
) , worldwide, is a very rare family name. The cognomen Janchen is habitual in Kazakhstan, where it is a very rare surname, Thailand, and Italy, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Thailand, Italy, and Brazil. Also, Janchen is the forename as well as the last name.
| erwin janchen Austrian botanist (1882-1970), AT (b. 1882) |
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