eDIL has it as "interception", but this looks like a calque on Latin: dil.ie/20695
eHogan mentions 11 townlands with this name, 8 in Galway, one each in Mayo, Laois and Offaly, and one in Clare (the calculation doesn't work out, but that's what it says). I assume that as a placename it refers to the territory between the two branches of a river.
From: Old-Irish-L <[log in to unmask]> On Behalf Of Janet Crawford
Sent: 10 September 2018 14:57
To: [log in to unmask]
I need a bit of help with "Eadarghabhal"
In No. Ireland it appears to mean a fort between forks of a river.
In the Republic it seems it was the name of the brother of Aenghus Bolg of Knockaney.
In the Republic it also seems to indicate early schools to train women in Christiaity. Many of those are tied to Finbarr of Cork, so perhaps a chain of Christian schools?
I am having a problem relating these very different things and need help please.