Manaig, Monaig) in the Early Christian period, a tribe dwelling further north in County Down and near Lough Erne which gave its name to the modern County Fermanagh.
[1][2] Early Irish genealogists mentioned that the Manaig had emigrated from the south of Leinster.
[1] The ethnonym Manapii has been phonetically compared with the Gaulish Menapii, a tribe from northern Gaul first recorded in the 1st century BC.
[1][2] Those names may ultimately derive from a Proto-Celtic form reconstructed as *Menakwī or *Manakwī.
[4][3] According to scholar Patrick Sims-Williams, the name Manapii may have been imported by settlers from Britain, for it shows a P-Celtic form that possibly came to be assimilated in the local Irish dialect as *Manakwī > Manaig.