Captain George Vancouver named the volcano for Britain’s ambassador to Spain, Alleyne Fitzherbert, also known as Baron St. Helens.
Alleyne FitzHerbert, 1st Baron St Helens PC was a British diplomat. He was Minister Plenipotentiary to Russia from 1783 to 1788, appointed Chief Secretary for Ireland and a member of the Privy Council (Great Britain & Ireland) in 1787, serving in the former position until 1789. He was Minister plenipotentiary to Spain from 1790 to 1794.