Surname Келль (Келль 
) , in the entire world, is a very rare family name. The cognomen Келль is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname, and Ukraine.
| келль, николай георгиевич Soviet geodesist, RU (b. 1883) |
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| лев николаевич келль Soviet mountain engineer, RU (b. 1912) |
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