Calloc'h, Jean Pierre, 1888-1917, Breton poet. Important in the revival of Breton literature, he wrote in the Vannes dialect of Brittany. His lyrical verse displays a love for the sea and a fascination with death; his chief work, Ar en deulin [on both knees] (1925), celebrates the life of Breton fishermen. Calloc'h, who died in World War I, is often regarded as Britanny's finest poet. He sometimes wrote under the pseudonym Bleimor.