David wa Wales (kwa Kiwelisi 'Dewi Sant'; 500 hivi - 589 hivi) alikuwa mmonaki, halafu askofu wa Mynyw (sasa St Davids). Alitunga kanuni ya kimonaki na alipinga vikali Upelaji. Wafuasi wake wengi waliinjilisha nchi za kandokando. Tangu kale anaheshimiwa na Wakatoliki na Waorthodoksi kama mtakatifu na msimamizi wa Wales. Mwaka 1120 Papa Kalisti II alithibitisha heshima hiyo. Sikukuu yake huadhimishwa tarehe 1 Machi. Watakatifu wa Agano la Kale Orodha ya Watakatifu Wakristo Orodha ya Watakatifu wa Afrika Orodha ya Watakatifu Wafransisko  Toke, Leslie (1908). "St. David". Catholic Encyclopedia. New York: Robert Appleton Company. B text. Public Record Office, MS. E.164/1, p. 8. (Kilatini) Phillimore, Egerton (ed.), 1888 "The Annales Cambriae and Old Welsh Genealogies from Harleian MS. 3859", Y Cymmrodor; 9 (1888) pp. 141–183. http://www.santiebeati.it/dettaglio/43425 Music for his Liturgy of the Hours has been edited by O. T. Edwards in Matins, Lauds and Vespers for St David's Day: the Medieval Office of the Welsh Patron Saint in National Library of Wales MS 20541 E (Cambridge, 1990).