Previously, I believed that the parents of 1050811Joan ___ were 2101622Thomas de Dene and 2101623Martha de Shelving. However, researcher Pete Andrews called my attention to 2101622Thomas' inquisitions post mortem, which I had overlooked. 2101622Thomas' two IPM's strongly suggest that he is not 1050811Joan's father (since the IPM explicitly notes 2101622Thomas' daughter Joan as deceased in early childhood, among other incongruences).

Nevertheless, because 1050811Joan certainly seems to be related to 2101622Thomas in some manner, and because my older work could prove useful for future research, I've isolated the profile pages that I'd written for 1050811Joan's formerly proposed ancestors into a separate section of my website, starting from the old version of Joan's page onward.

You can see a list of those ancestors or a family tree of them.
538015388Oyn Porcell
Key Facts
Snapshot:royal servant; owned Catteshall, Sussex
Parents:unknown
Born:unknown
Died:unknown
Buried:unknown

I know of 538015388Oyn Porcell from just two records, both of which were created some years after his death, and neither provides many details.

538015388Oyn was an usher and marshall ("hostiario ⁊ marescall" 1) for King Henry I, who in turn gave 538015388Oyn property at Catteshall, Sussex.2

538015388Oyn's son 269007694Ranulf later inherited his father's service role and his Catteshall property.1,2 *

Footnote:

*However, a past researcher has questioned this inheritance. See the discussion in: E. St. John Brooks, "Catteshill and Another Usher Serjeanty in the Purcel Family," Bulletin of the Institute of Historical Research, Volume 10, Issue 30 (February 1933), pages 161–168. St. John Brooks in turn refers to (and corrects) several statements from: John Horace Round, The King's Serjeants & Officers of State, with Their Coronation Services (James Nisbet and Co., London, 1911), pages 98-100.

Sources Cited:

1: T. D. Hardy, ed., Rotuli chartarum in Turri Londinensi asservati (1837), page 160, right column.

2: Liber Feodorum: The Book of Fees Commonly Called Testa de Nevill [...]: Part I, A.D. 1198-1242 (London, 1920), page 67