Family name Otão (Otão 
) , around the world, is a very rare cognomen. The family name Otão is characteristic of Southern Europe, particularly Portugal, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Otão | Portugal |
| otão iii de lebarten (b. 927) |
|
|
| irmão josé otão Brazilian writer (1910-1978), BR (b. 1910) |
|