'''' In medieval Wales, a legal framework had developed based on the ancient
Celtic laws and traditions similar to those in Ireland. These included a custom of gavelkind inheritance known as ''''.
Cyfran was an ancient tradition passed down orally by jurists and
bards until the mid-10th century, when the laws were codified during the reign of
Hywel Dda. The
Cyfraith Hywel would become the most well-known and widely-adopted Welsh legal structure, and many of the laws were concerned with inheritance. The concept of
cyfran stated that on a landowner's death, his land would be divided equally among all of the sons, including those who were illegitimate. The continual division of lands and titles with each successive generation has been seen by some historians as detrimental to the success and stability of Welsh princes and lords, especially compared to the system of primogeniture practised in
Norman England and by the
Marcher Lords, whose entire patrimony was often passed on directly to the eldest son. The Welsh historian
Philip Yorke, writing in 1799, summarised the situation: The
Laws in Wales Acts 1535–1542 saw the Welsh legal system being replaced with English law, and the laws associated with gavelkind were replaced with those of primogeniture. However, as in England, the custom of gavelkind was not finally abolished until the Administration of Estates Act 1925. ==Gavelkind in Ireland==