The name Inkpen comes from the village of that name in Berkshire. A manorial family took its name from the village in the 13th century. They were quite influential over the two hundred years they held the manor, and managed some very good marriages. However, in the end, they sold the manor. At the time, the village appears to have been spelt Inkepenne, and so the name appears too. The first to hold it was a Roger de Inkepenne who married an Isabel. whether he is the Roger who was also married to an Emeline, who disputed the lands of Caerhays Castle (which belonged to the Arundells), I do not know, as the dates have not been written down in the article I read), but it is significant that my descent from the Inkepennes comes through the Hills then the Arundells to the Luttrells. Roger owned land in Winchester Hampshire, too. I found this information: Survey of Medieval Winchester
The tenement representing 917 was subsequently acquired by Philip de Castro, clerk, who before 1300 granted it to Henry Mundi le Gate and his wife cicely Auncel, who were to pay rents of 15d to John de Welewe, 6d, to the chaplainss of the fraternity of Of St Peter 9oneof the components of the Frary and Kalendar) and a gillyflower to the donors. This may have been the messuage next to the tenement of Henry le Wayte (part of 917) on the W side, which in 1290, Henry le Wayte and his wife Alice granted Roger de Inkepenne and his wife Isabel. De Inkepenne and his wife certainly acquired 917, for before 1300 John de Welewe and his wife Juliana quitclaimed to them in the 15d rent due from the tenement. John de Inkepenne was presumably later in possession of the property and it was probably in connection with securing his title to it that by 1352 he paid 30 pounds to Philip le Wayte. This was probably de Inkepenne’s tenement in Wode Street, erroneously (?) said to be in the city liberty, from which in 1352 the Frary and Kalendar had 6d rent granted by Lucy Ayssul. 917 was later part of the same property as 914. The lineage I have is:
1.Roger de Inkepenne m Isabel 2. John d osp Richarda (our line) Robert d 1405 m Margery (m 2) John Beneyt 3 Richard 4.Robert 5 John 6.Richard 7. Adrian, William, and Francis Inkepenne hand land over.
Whether all Inkepennes/Inkpens are descended from the three sons of Richard, I do not know, but the handover took place in 1597. Hope this helps.