Sibyl verch Cadwaladr ap Robert
- Marriage (1): Rowland Vaughan of Caer Gai
From The History of the Princes, the Lords Marcher, and the Ancient Nobility of Powys Fadog, Vol. 6, by J. Y. W. Lloyd, London, 1887, p. 115:
"Sibyl, d. of Cadwaladr ab Robert ab Rhys of Plās yn Rhiwlas. Gules, a lion rampant argent, holding in its paws a rose of the second, leaves and stem, ppr. See 'Cynllwyd'."
Sibyl married Rowland Vaughan of Caer Gai, son of Owain Vaughan of Llwydiarth and Elizabeth verch Thomas ap Howel.