I don't know the north side of Dublin, let alone Clontarf.

My parents (from Ballsbridge & Stillorgan) kidnapped me as a baby and removed me to foreign parts. I now live in even foreigner parts, so I have to keep referring to maps or relying on cousins to put me right....
The gg-grandparents lived until at least 1840 in or around Clontarf where 6 of the 7 children were born (Seafield Avenue and Black Quarry in 2 cases, the rest just 'Clontarf'. One son died young and his address is Killester according to the Glasnevin records.
I'll be posting separately about the 'Misses Downes' who owned property in the area and whom I want to eliminate.