Harleian genealogies

The Harleian genealogies are a collection of Old Welsh genealogies preserved in British Library, Harley MS 3859. Part of the Harleian Library, the manuscript, which also contains the "Annales Cambriae" (Recension A) and a version of the "Historia Brittonum", has been dated to "c." 1100, although a date of c.1200 is also possible. Since the genealogies begin with the paternal and maternal pedigrees of Owain ap Hywel Dda (d. 988), the material was probably compiled during his reign. The collection also traces the lineages of less prominent rulers of Wales and the Hen Ogledd. Some of the genealogies reappear in the genealogies from Jesus College MS 20.