Across the world, นิธิอรรถ (นิธิอรรถ 
) is a very rare largely masculine, but infrequently feminine first name. The first name นิธิอรรถ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare principally male, but scarcely female name. Very seldom, นิธิอรรถ is the last name as well as the forename.