Last name ญาณโรจน์ (ญาณโรจน์ 
, Yanaroj , Yanarot ) , around the world, is a rare cognomen. The last name ญาณโรจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ญาณโรจน์ is the forename as well as the last name.