The Nagnatae (Ναγνάται) or Magnatae (Μαγνάται) were a people of ancient
Ireland, recorded in
Ptolemy's 2nd century Geography as living in northern
Connacht.
O'Rahilly suggests a connection between the Nagnatae and the
Fir Ól nÉcmacht, a people of early Connacht, assuming a degree of corruption in the transmission of both names.[1]
For the town in their territory see
Nagnata.
References
^T. F. O'Rahilly (1946). Early Irish History and Mythology. Dublin Institute for Advanced Studies. pp. 2, 11–12.