Listen to Unnaiyum Marappathundo online. Unnaiyum Marappathundo is a Tamil language song and is sung by T. M. Sounderarajan. Unnaiyum Marappathundo, from the album Mannanaalum - Tms Dev Songs, was released in the year 1999. The duration of the song is 4:57. Download Tamil songs online from JioSaavn.