Sos Math was a singer in Cambodia during the 60's and 70's. His songs are rather sad and mellow. He was shortly married to Rous Sareysothea. Along with the other artists, he also perished during the Khmer rouge. He's survived by his son Sos Mach but not to be mistaken, his son Sos Mach was with another woman, not Rous Sareysothea.
