Brehemons laws

• The Brehon Laws were statutes that governed everyday life and politics in Ireland until the Norman invasion of 1171 (the word "Brehon" is an Anglicisation of breitheamh (earlier brithem), the Irish word for a judge). The laws were written in the Old Irish period (ca. 600–900 AD) and probably reflect the traditional laws of pre-Christian Ireland. These secular laws existed in parallel with, and sometimes in conflict with, Canon law throughout the early Christian period.

Source: Brehon Laws Wikipedia.com