Incidentally, the vicious Edmund Spenser, in his book A View of the Present State of Ireland has a lot to say about the Brehon laws, for instance:

Eudox: What is that which you call the Brehon law? it is a word unto us altogether unknowne.

Iren: It is a certaine rule of right, unwritten, but delivered by tradition from one to an other, in which oftentimes there appereth great shew of equity, in determining the right betwene part and party, but in many things repugning quite from gods law and mans, as for example, in the case of murther. The Brehon that is ther judg, will compound betwene the murtherer, and the frends of the party murthered, which prosecute the action, that the malefactor shall give unto them, or to the child, or wife of him that is slaine, a recompence, which they call an Iriach; by which vile law of thers, many murders are amongest them made up and smothered. And this judg being, as he is called, the Lords Brehon, adjudgeth for the most part a better share unto his Lord, that is the Lord of the soyle, or the head of that septe, and also unto him self, for his judgment, a greater portion than unto the plaintifes or parties grieved.