Globally, นิธิรุจ (Nithiruj 
, นิธิรุจ , Nithiruch ) is a very rare largely masculine, but infrequently girly given name. The forename นิธิรุจ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare dominantly boy's, but uncommonly feminine name. Much less frequently, นิธิรุจ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Nithiruj, นิธิรุจ, Nithiruch | Thailand |