John Roy Anderson (born 25 October 1944) is an English and American singer, songwriter and musician, best known as the former lead singer of the progressive rock band Yes, which he formed in 1968 with bassist Chris Squire. Renowned for his alto tenor range, he was a member of the band across three tenures until 2004, and was also the singer of the Yes-linked project Yes Featuring Jon Anderson, Trevor Rabin, Rick Wakeman. Born a citizen of the United Kingdom, he became an American citizen in 2009.
https://en.wikipedia.org/wiki/Jon_Anderson