Ah - it's you - my favourite visitor, hope you enjoy this one - Jethro Tull is not the name of the rock singer responsible for such songs as "Aqualung" and "Thick as a Brick." Jethro Tull is the name of the band. The singer is Ian Anderson. The original Jethro Tull was an English horticulturalist who invented the seed drill. Thanks for your visit - please bookmark me.