Nikola (Slavische)
Nicola (Italiaanse)
Nikkie
Niko (Finse)
Nikky
Nikko (Engelse)
Nicolet
Nicolas (Franse)
Rik, Nye, Ric, Rick, Chik, Neil, Dick, Ned, Zak, Jak, Link, Mike, Miky, Miko, Mick, Miki, Naim, Nap, Nat, Nile, Niel, Nial, Ner, Nev, Niaz, Nikos, Nikky, Nikki, Nicky, Nikko, Nico, Noe, Noak, Nur, Oak, Pink, Pike, Riki, Rikk, Vick, Vic, Wick