plural noun Irish History.
Examples from the Web for fianna
And there is no news told of them, until such time as they came to where the seven battalions of the Fianna were waiting for Finn.
And one night there were two men minding sheep in a valley, and they were saying the poems of the Fianna while they were there.
And then Finn gathered together the seven battalions of the Fianna from every part where they were to Almhuin.
And Osgar brought him back to where the Fianna were, and they saw a great army coming as if in search of them.
And when Finn heard that, he sent a challenge of battle, and he gathered together all the Fianna that were left to him.