Somrot Kamsing (Thai: สมรถ คำสิงห์, RTGS: Somrot Khamsing; born 24 September 1971), professionally known as Pimaran Sitharan (Thai: พิมพ์อรัญ ศิษย์อรัญ, RTGS: Phim-aran Sit-aran) is a retired boxer from Thailand, who competed at the 1996 Summer Olympics. An older brother of Somluck Kamsing, he was defeated in Atlanta, Georgia in the quarterfinals of the men's light flyweight division (– 48 kg) by Bulgaria's eventual gold medalist Daniel Petrov.