Across the world, Rangsiwut (รังสิวุฒิ 
, Rangsiwut , รังษีวุฒิ ) is a rare principally male, but very infrequently girly first name. The first name Rangsiwut is characteristic of South-eastern Asia, particularly Thailand, where it is a rare primarily boy's, but very infrequently female name.
Panya, Thammakhan, Saowapaksuk, Ritthitada, Ragsatiwarat, Chantawee, Hansamut, Taengoon, Rititada, Rittitada, Poltawee, Chaiprom, Samoephop, Maneesri, Taengon, Ritithada, Rodaiat, Kimkaeo, Kongvet, Kongvej, Hmudyafa, Namsam, Rodiat, Sohhab, Upakaracam, and Khamprasert