Surname พรรษวุฒิ (พรรษวุฒิ 
, Patsawut , Passawut ) , in the entire world, is a very rare last name. The surname พรรษวุฒิ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much more frequently, พรรษวุฒิ is the forename as well as the last name.