Mo Chua or Crónán mac Bécáin, also called Claunus, Cuan, Mochua, Moncan and Moncain (died 30 March 637) was the founder of Balla, whose diocese was subsequently merged into that of Tuam, Ireland. He is not to be confused (though he often is) with his contemporary Crónán of Roscrea (died 640). His death in 637 is included in the Annals of the Four Masters. His wondrous acts are mainly legendary.