Koolen ti o dara ju ìdílé itumo: Igbalode, Fetísílẹ, Awọn, Ti nṣiṣe lọwọ, Oninurere. Gba Koolen itumo ti ìdílé.
Koolen Oti. Derived from the given name Nicolaas. Gba Koolen Oti.
Bakannaa surnames for Koolen ni orisirisi awọn orilẹ-ede ati ede: Claes, Claesson, Clausen, Cola, Collins, Klasson, Klausen, Mikolajczak, Nichols, Nicholson, Nicolai, Nicolas, Nicolescu, Nicolson, Nielsen, Niklasson, Nikolaev, Nikolajsen, Nikolić, Nikolov, Nilsen, Nilsson, San nicolas. Gba Koolen ni awọn ede.
Wọpọ surnames pẹlu orukọ Nichols: Nichols. Gba Akojọ ti awọn surnames pẹlu orukọ Nichols.