Surname Lengassi-Ossona (Lengassi-Ossona 
) , all over the world, is a rare last name. The cognomen Lengassi-Ossona is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is a rare surname. Parts of the name also exists independently as a last name Lengassi, and a last name Ossona.
| VARIANT | COUNTRY |
|---|---|
| Lengassi-Ossona | Democratic Republic of the Congo |