Cognomen Crassa (Crassa 
) , around the globe, is a very rare surname. The family name Crassa is habitual in France, where it is a very rare surname, Italy, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Crassa | Italy, France, United States |
| licinia crassa mother of Mucia Tertia |
|