Surname Ritwo (Ritwo 
) , all around the world, is a very rare family name. The cognomen Ritwo is characteristic of Northern America, particularly the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ritwo | United States |
| ester ritwo holocaust victim, b. 1874-05-25, DE (b. 1874) |
|