Glenn Robertson Yarbrough (January 12, 1930 – August 11, 2016) was an American folk singer and guitarist. He was the lead singer (tenor) with the Limeliters from 1959 to 1963 and also had a prolific solo career. Yarbrough had a restlessness and dissatisfaction with the music industry which led him to question his priorities, later focusing on sailing and the setting up of a school for orphans.

Source: Wikipedia (https://en.wikipedia.org/wiki/Glenn_Yarbrough)