There's a story about the writing of the song "Castlehyde" in T. Crofton Croker's 'Popular Songs of Ireland' under "Groves of Blarney" (no index or table of contents in my 1886 reprint of the 1838 edition). The tune was composed by James Oswald and named after his place of business in London, "St. Martin's Churchyard" (#1175 in 'Sources of Irish Traditional Music', I, 1998). The tune was later called "Groves of Blarney", "Castlehyde", and "Bells of Shandon" among other titles.