When in Dublin on Tuesday, I found another translation at the top of Camden Street.
I suppose that this allows any Harrington to legally have a number of aliases.
Cearnóg An Urdalaigh – Harrington Square (Cork)
Sraith Uí Arrachtáin – Harrington Row (Cork)
Sráid Longardail – Harrington Street (Dublin)
Rae Uí Úrdail – Harrington Row (Cork)
Sráid Harrington – Harrington Street (Dublin)
Further evidence of the difficulty of trying to learn Irish from streetsigns.