Surname โอฬารรัตน์ (โอฬารรัตน์ 
, Olanrat ) , around the globe, is a very rare cognomen. The family name โอฬารรัตน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, โอฬารรัตน์ is the forename as well as the last name.