↑ 10.010.110.210.310.410.510.610.7 Richardson, D. Magna Carta Ancestry: A Study in Colonial and Medieval Families, Royal Ancestry series, 2nd edition, 4 vols., ed. Kimball G. Everingham, (Salt Lake City, Utah: the author, 2011), Volume I, page 299, #8. Google eBook
↑ Richardson, D. (2011). Plantagenet Ancestry: A Study In Colonial And Medieval Families, (2nd ed, pp.530). Google Books
↑ August 31 – King Richard II of England begins an invasion of Scotland. The English burn Holyrood and Edinburgh, but return home without a decisive battle.Wikipedia
Blanton, V. (2010). Signs of Devotion: The Cult of St. Æthelthryth in Medieval England, 695-1615 (pp.212). Penn State Press. Google eBook.
Faris, D. Plantagenet Ancestry of Seventeenth-Century Colonists. Baltimore, MD, USA: Genealogical Publishing Co., 1996. Online: Ancestry.com. Plantagenet Ancestry of Seventeenth-Century Colonists [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2006.
Richardson, D. (2011). Plantagenet Ancestry: A Study In Colonial And Medieval Families, (2nd ed, pp.530). Google Books
Weis, F.L., Sheppard, W.L & Beall, K.E. (2004). Ancestral Roots of Certain American Colonists who Came to America Before 1700: Lineages from Alfred the Great, Charlemagne, Malcolm of Scotland, Robert the Strong, and Other Historical Individuals, (pp.15). Genealogical Publishing Co. Google eBook
Douglas Richardson lists only Joan Poyning as a wife in Magna Carta Ancestry: A Study in Colonial and Medieval Families, 2nd Edition ... So, she is listed in the profile and de Hoo and the references for her are listed in a footnote.
I think that it is possible that Henry had 2 wives called Joan, Joan de Hoo and Joan de Poynings, on tudor place their full (but separate lines) are recorded. Simply put I do not think that there is a 3rd wife - Joan de Hoo Poynings, but more research could prove otherwise!