Ioannis Vlachos (Daskalogiannis)

Ioannis Vlachos (1722 or 1730–1771), better known as Daskalogiannis, or John the Teacher, was a wealthy Cretan shipbuilder and shipowner. Born at Anopolis in Sfakia, he was educated abroad.

He owned four three-masted merchant ships sailing out of southern Crete and served as chairman of Sfakia from 1765. In 1770 he led the Sfakian revolt against Ottoman rule. The rising failed; Daskalogiannis surrendered at Frangokastello and was put to death on 17 June 1771, becoming a hero of Cretan folk song.