Sources from Becky Thill: http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=ttg13&id=I4078

Title: Archeologia Cambrensis the Journal of the Cambrian Archeological Association, London: J. Russell Smith, 1857 : 5 Ser., VIII
Note: 
Source Medium: Book

Page: 260. Gwydir Family, Wynne. Also, 58
Title: Lewys Dwnn (ed. by S R Meyrick), Heraldic Visitations of Wales and part of the Marches, bet 1586 and 1613" , 2 vols (Llandovery, 1846): II, 304
Text: CYNRIC AP ITHEL, Vychan, of Bodfari and Yskeiviog, Flintshire, alive after 1420, married Tanglwystl, daughter and heiress of Gruffydd lloyd ap David ap Meredith ap Gruffydd. (Dwnn II, 304, Arch. Camb., 5 Ser., VIII, 260. Gwydir Family, Wynne. Also, 58) Other authorities state that he also married a daughter of Gruffydd ap David ap Meredith ap Rhys. He had by one or the other of these wives issue as follows: 1. John 2. Rhys 3. Harri;
Title: "Royal Tribes of Wales" by Philip Yorke, Esq. [Liverpool 1887], Richard Williams, ed., pp. 7-9
Note: 
Source Medium: Book

Title: Hazel A. Formby, Caerwys Village Historian, Flintshire, Wales
Title: "The Wynnes", T. B. Deems, Knightstown, IN, Aetna Printing Co., IN 1907
Note: 
Source Medium: Book

Text: p. 171 Ithel Vychan [Vaughn] ap Cynric ap Ratpert ap Iowarth ap Ririd ap Iowarth ap Madog ap Ednowain Bendew, Lord of Tegamgl and Chief of the 15th Noble Tribe of Wales. This Ithel Vychan of Holt, Denbigh and Northrup, in right of his wife, and of Bodfari and Yskeiviog, Flintshire, after his marriage went to live upon his wifes estate at Holt in Denbighshire. His great grandson, Richard, was living at Holt in 1488, but Richard's son William Succeeded his uncle John at Chilton in Shropshire, England, which had been granted by Henry VII to his branch of the family for services on Bosworth field, together with a new coat of arms of the tinctures borne by Henry himself in that battle, viz: Argent and vert. Ithel Vychan had two sons Cynrid and David.
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.
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.
had:
Ellis ap Harri, of Ysceifiog
had
Hugh ap Ellis ap Harri, of Ysceifiog, who had alice, event. h. who m. John Myddleton, of Gwaynynog, Esq. [d. 1588], and had William who m. Catherine, dau. of John Conway, Esq., of Bodrhyddan, David, and other issue.