Gruffudd ap Jenkin

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/5216/Bleddyn... (June 29, 2017; Anne Brannen, curator)

See Peter Bartrum, https://cadair.aber.ac.uk/dspace/bitstream/handle/2160/4984/aleth%2... (November 29, 2016; Anne Brannen, curator)

Please see Darrell Wolcott: Einion ap Celynin of Llwydiarth; http://www.ancientwalesstudies.org/id138.html. (Steven Ferry, October 17, 2020.)

Please see Darrell Wolcott: The 5 Dafydd Llwyds of Llanwrin Parish; http://www.ancientwalesstudies.org/id254.html. (Steven Ferry, February 12, 2021.)

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From http://www.ralphvaughan.com/F7/articles.php?article_id=328 :

Griffitth ap Jenkin married Mallt, daughter of Howel Sele of Nannau. Griffith, through a court decision, was awarded the freehold land called Gavel Loidiarth later called the Township of Llwydiarth.

See Lloyd, "The History of the Lords Marcher," 1884, Whiting and Co. vol IV, p. 103. His information is taken from Harley MS 4181.