I've heard the Diarmuid Ò Suilleabháin recording, mentioned earlier in this thread. It's not the same words nor tune that the O Beaglaoich / Begley family sing. Ó Suilleabháin sings verses in English and verses in Irish.
The Begleys' version (second tune posted by Alison) is as given at the Druidstone site under the title "Edge of the White Rocks", with lyrics in Irish and English translation provided