All around the world, ניקולאו (Nicolau 
, ניקולאו 
) is a common boy's first name. The forename ניקולאו is habitual in Cabo Verde, where it is quite a common masculine name, Guinea-Bissau, and Brazil, where it is quite a rare masculine name. In absolute terms, it is commonest in Brazil, Angola, and India. Also, ניקולאו is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nicolau | Brazil, Spain, Portugal, Romania, Angola |
| ניקולאו | Israel |
Miklos, Miklós, Mikola, Mikołaj, Mikuláš, Mykola, Mykoła, Niccolò, Nicholas, Nicolaas, Nicolae, Nicolas, Nicolás, Nicos, Niels, Niko, Nikolai, Nikolai, Nikolaj, Nikolaj, Nikolajus, Nikolao, Nikolaos, Nikolas, Nikolass, Nikolaus, Nikolay, Nikolaz, Nikolaï, Nikos, Nikołaj, Nils, Nyikolaj, Νίκολας, Νίκος, Νικολάου, Νικόλαος, Νικόλας, Коля, Миклош, Микола, Миколай, Микулаш, Мыкола, Мікалай, Міклаш, Мікола, Никколо, Нико, Никола, Николае,