Hello Gensearcher,
My Whelans are the large branch from Loughnageer in Clongeen.
My White line covers pretty much all the Whites in the Bannow, Rathangan (and to some extent Kilmore) areas.
Are you focusing on any Whelan/White names/dates in particular?
I have a small tie to Rossiter too, but Merve Rossiter is the best contact on that line.
Haven't come across Noctor, but feel it might be from the 'north of the county'? One of the White lines was strong up north, in the Gorey area.