The House of Deheubarth was a medieval Welsh royal dynasty that ruled over the region of Deheubarth in southwestern Wales. It emerged in the 10th century and was known for its significant influence in Welsh politics and culture. The house was founded by Hywel Dda, a notable king who is remembered for his legal reforms and efforts to unify various Welsh kingdoms. The dynasty faced various challenges, including conflicts with neighboring kingdoms and internal strife. Despite these difficulties, the House of Deheubarth played a crucial role in the preservation of Welsh identity and heritage during a time of political fragmentation in Wales. Its legacy continues to be recognized in Welsh history.