Cia marra OK list so far we agree on the Tag or Tagh = House and the derivation of the rest "arina' could be one of Queen, Marsh or Headland, so House of one of those three. James Macklin's house was in a Parish right across the River Foyle from Derry, so Headland and Marsh could fit as the House could be next to a tidal basin and close to the coast. So I can presume that the Foyle experiences tides of some sort and that this/these tides had an effect up stream so to speak in the Parish of Clondermott. The history of this Parish [where they lived] is based on the ancient territory of the Clan-Diarmata, [from whence we get the name] a Sept of the Cenel Eoghain on the East side of the River Foyle. I just love how old genealogy of some of the Chiefs and sub-Chiefs to Sept MacLochlainn live on to this very day. My next step is to get an Ordinance map that covers this Parish to see if there are any rivers there including the obvious River Faugan. This is where genealogy really gets interesting. Again, my thanks to the list Slan Eric