The Belgae were a large confederation of tribes living in northern Gaul, between the English Channel, the west bank of the Rhine, and the northern bank of the river Seine, from at least the third cent
Britain.south.peoples.Ptolemy
According to Strabo: the Belgian tribes (in orange), including the Armoricani (in purple)
In medieval Irish myth, the Fir Bolg are the fourth group of people to settle in Ireland. They are descended from the Muintir Nemid, an earlier group who abandoned Ireland and went to different parts
Belgae
…also called Belgae and had apparently moved from the continent. T. F. O'Rahilly believed that some had moved further west and he equated them with the Fir Bolg in Ireland. The Roman province of Gallia Belgica was named after the continental Belgae. The term continued to be used in the region until the present…
Ambassadors of the Fir Bolg and Tuath Dé meeting before the Battle of Moytura. An illustration by Stephen Reid in T. W. Rolleston's Myths & Legends of the Celtic Race, 1911