Efa verch Einion ap Howel

  Research Notes:

Source: A Genealogical and Heraldic Dictionary of the Landed Gentry of Great Britain & Ireland" by John Burke & John Bernard Burke, vol. I (London, 1847), p. 656

Efa married Ieuaf ap Ninniau, son of Ninniau ap Cynric and Unknown. (Ieuaf ap Ninniau was born in Denbighshire, Wales.)