Ia (Hya, Ives), patron of St. Ives, Cornwall, according to local tradition was an Irish virgin who sailed across the Irish Sea on a leaf. She was said to be a sister of Euny. Leland saw a Life of her at St. Ives which made her a noble of St. Barricus; a church was built at her request by Dinan, a great lord of Cornwall. Breton tradition, however, makes her a convert of Patrick the Older: she came to Armorica with 777 disciples and was martyred there. She is the eponym of Plouyé, near Carhaix. She should not be confused with Ives of St. Ives, Hunts. Feasts: 3 February and 27 October.

Bibliography
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• G. H. Doble, The Saints of Cornwall, i (1960), 89–94. William Worcestre, p. 115