Hello Pat, I am able to confirm that Drumragh Parish Church (Church of Ireland), Omagh is dedicated to St. Columba. Rev. William Chartres was curate of Drumragh 1859-70 and rector of the parish 1875-93 - taken from "Derry Clergy and Parishes" - Canon James B. Leslie (1937). Trust this is useful, Len Swindley, Melbourne, Australia