Family name Nikolaii (Николайй , Nikolaii ) , across the world, is an extremely rare cognomen. Much more frequently, Nikolaii is the forename as well as the last name.
Николаий, and Николайи
Stewart, Lodenos, Todorov, Nikolov, Grigorov, Ovanesyan, and Rodriguez
, Nikolaii 
) , across the world, is an extremely rare cognomen. Much more frequently, Nikolaii is the forename as well as the last name.