Nicolai may refer to:
*
Nicolai (given name) people with the forename ''Nicolai''
*
Nicolai (surname) people with the surname ''Nicolai''
*
Nicolai (crater), a crater on the Moon
See also
*
Niccolai, a surname
*
Nicolae (disambiguation)
*
Nicolao
*
Nicolay (disambiguation)
*
Nikolai (disambiguation)
*
Nikolay (disambiguation)
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