Sources from Becky Thill: http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op...=ttg13&id=I24515

Sources:
1. Title: The Royal Descents of 500 Immigrants to the American Colonies of the United States, By Gary Boyd Roberts of the New England Hist Genealogical Society
Note: 
Source Medium: Book

2. Title: Chris K. Moore ckmmoore@erols.com
3. Title: Lewys Dwnn (ed. by S R Meyrick), Heraldic Visitations of Wales and part of the Marches, bet. years 1586 and 1613" , 2 vols (Llandovery, 1846): 2-336
4. Title: The History of Powys Fadog, IV, 305-22, "Thelwall of Plas Y Ward, Lewys Dwnn, vol ii; Harl. MS. 9865, fo. 81
Note: 
Source Medium: Book

Text: 1. Alis, ux. Harry ab Cynwrig ab Ithel Fychan of Ysgeifiog in Tegeingl.
5. Title: Geraint H. Jenkins, BA, PhD., DLitt, Prof, Director, Univ. of Wales, Centre for Advanced Welsh and Celtic Studies, N. L. W., Aberystwyth, Ceredigion
6. Title: Wynnstay MS 143, Salusbury Pedigree MS, Transcript 1832, by Joseph Morris
Note: 
Source Medium: Book

Page: pp. 585-6, John Wynn ap Hugh H.S.C. 1551, 1560
Text: This is taken from Wynnstay Ms 143 which is _Salusbury Pedigree Ms, a transcript made 1832 by Joseph Morris of a collection of pedigrees made 1630 x 1637 by Owen Salusbury of Rhug and John Salusbury of Erbistock_ The originals were barbequed in a house fire at Wynnstay Manor.
Sir Richard Thelwall - - John Thelwall = Felice or Alice fh Walter Cooke alias Ward. Others say she was dtr. & h. of John ap Rhys Vychan by sd. Alice. had child David Thelwall = Tybott v. Jenkin Wild of Borasham in Bromfield had child Symon = Joan v. Edward Longford had child: Alice ux. Henry ap Kenrick ap Ithel of Skeivioc (sic)
7. Title: RNT-Marriage for David was shown but not proven,until we can confirm this information
Page: Date Question:
Text: Joan' grandfather d. 1466 and her husband is b. about 1485. But only that death date is concrete, so I am not sure how they figure that the generations don't match up. Per conversation with Kay Allen, AG
8. Title: "Pedigrees of Anglesey and Carnarvonshire Families" by John Edwards Griffith, 1914 ed
Note: 
Source Medium: Book

Text: p. 274 Ales = Harry ap Cynwrig ap Ithel Vychan, of Ysgeifiog, in Tegeingl.
9. Title: Hazel A. Formby, Caerwys Village Historian, Flintshire, Wales
10. Title: "Pedigrees of Some of the Emperor Charlemagne's Descendants", Vol. II, Comp. Aileen Lewers Langston, J. Orton Buck Jr., forward Timothy Field Beard
Text: p. 330 Alice Thelwell [Thewal] [Thew] [Thewall], b. at Plas y Ward; m. Harry ap Cynric, b. at Yskeiviog, Wales, prob. in 1485
11. Title: "Colonial Families in Philadelphia", editor John W. Jordan, Pub; Clearfield Company, VOL III, Clarence P. Wynne
Note: 
Source Medium: Book

Text: pg. 1189
Ithel Vychan, of the eighth generation of the descendants of Ednowain Bendew, and ancestor of Dr. Wynne, married a descendant of Owen Gwynedd, Prince of North Wales, and his grandson, Harri ap Cynric, ap Ithel Vychan, to whom has descended the lands of Yskeiviog, the birthplace of Dr. Thomas Wynne, married Alice Thelwal, daughter of SImon Thelwal, Esquire, and his wife Janet Langdord, of the family of Langdord, long rulers of the castle of Ruthin, Denbighshire, and through his son John Wynne, the patronymic of the Pennsylvania Family first appears.
12. Title: Welsh Founders of Pennsylvania, Thomas Allen Glenn, Gen. Pub. Co. 2 vols in 1, 1970
Text: Chart between pg 20-21
John Thelwall, of Plas yn Ward, m. Ffelis, dau. of John ap Rhys, by Alice dau. and h. of Sir Walter Cooke, Knt.
had:
David Thelwall of Plas yn Ward, m. Tibot, dau. Jenkin de Weild, of Borasham
had:
Simon Thelwall, of Plas yn Ward, Co. Denbigh, Esq. = Janet Langford
Richard Langford, Constable of Ruthin Castle. Receiver of Ruthin 1431. s. John L. Constable of R. and Steward of Vale of Clwyd.
had: Edward Langford, Constable of Ruthin Castle. D. 16 Hen. VI., m. Ellen, dau. of John Dutton of Dutton.
had: Janet Langford = Simon Thelwall, of Plas yn Ward, Co. Denbigh, Esq.
They had:
Alice Thelwall, dau. Simon = Harri ap Cynric [or Cynwrig] of Ysceifiog.
Pg 95
Harri ap Cynric, [1. Dwnn, ii., 304] of Ysceifiog, [2. I cannot find that he held any considerable lands, if any at all, in the parish of Bodfari, and the farms there seem to have gone to his brothers. Rhys ap Cynric, called Rees Wyn [Wynne], was of the township of Aberwhiler., or Aberweeler, in Bodfari. He was born 1487, and had several sons who were freeholders there. One of them, John ap Rees Wyn, was buried at Bodfari, 1607, aged 93 years. Harri ap Cynric, however, was possessed of part of Ysceifiog, including Bron Vadog, the home of Dr. Thomas Wynne, to whose immediate family it descended.] was born probably about 1485, and was a man of very considerable standing in his county. Bron Vadog, in Ysceifiog, appears to have been a part of his possessions.
Harri ap Cynric married Alice, daughter of Simon Thelwall, [3. Dwnn, ii, 304; "History Powys Fadog," iv., 306] of Plas yn Ward, Esq., by Janet, daughter of Edward Langford, of Ruthin, in the county of Denbigh.
This Simon Thelwall was son unto David Thelwall of Plas Yn Ward, by Tibot, or Tabitha, daughter of Jenkin de Weild, of Borasham.
The Langford family was of Allington and Ruthin, in Denbighshire. John Langford was constable of the Castle of Ruthin, and steward of Dyffryn Clwyd, and his son, Richard Langford, was likewise constable of the same castle, and died 12 July 1466. He was succeeded by his son, Edward Langford, constable of Ruthin Castle, who died 16 Henry VII., and whose wife, eleanor, daughter of John Dutton, of Dutton, died 5 Edward IV.
Issue:
i. John Wynne ap Harri, of whom presently
ii. Thomas ap Harri, of Ysceifiog, who had issue, inter al., Rees Wynne ap Thomas ap Harri, of Ysceifiog, who had Thomas Wynne, Baptized 1581, and other issue. [4. Bodfari Parish Register].