A very detailed and recent analysis, looking at new documents, has been made by the Medieval Genealogy Newsgroup, here. In summary, the connection to Eubolo is through John le Strange's first wife Eleanor, or Alianor, whose mother was Joan Bohun, who married three times, and was also known as Joan Somery, which is a cause of some confusion. Douglas Richardson writes: "Lady Joan Somery's third husband was Sir Ebal de Mont (or Monts), Knt. (died 1268), of Milton, Cambridgeshire, Ketton, Rutland, etc., co-seigneur of Mont, canton Vaud, Steward of the Household to King Henry III, Constable of Windsor Castle. While Joan had no issue by her 1st and 2nd husbands, Joan and Ebal had one daughter, Eleanor, wife of Sir John le Strange, Knt., 1st Lord Strange of Knockin (died 1309)". Eubolo is from the Latin form of the name, which was not apparently a well-known name in England. Canton Vaud, north of Lake Geneva is where the Lords of Mont built Rolle Castle in this period. See here for some details of his life. The French Wikipedia has an article about his family, wherein he is referred to as Ebal II des Monts. His parents were Ebal I des Monts, lord of Monts, and Beatrice. His elder brother Henri was heir to the lordship. The parents of Ebal I were Conon des Monts (also lord of Monts) and Adelais. The parents of Conon were Louis des Monts, lord of Monts, and Amblara.
This person was created through the import of Acrossthepond.ged on 21 February 2011. The following data was included in the gedcom. You may wish to edit it for readability.
Featured Asian and Pacific Islander connections: Eleanor is 29 degrees from 今上 天皇, 22 degrees from Adrienne Clarkson, 24 degrees from Dwight Heine, 30 degrees from Dwayne Johnson, 25 degrees from Tupua Tamasese Lealofioaana, 24 degrees from Stacey Milbern, 23 degrees from Sono Osato, 37 degrees from 乾隆 愛新覺羅, 23 degrees from Ravi Shankar, 26 degrees from Taika Waititi, 23 degrees from Penny Wong and 21 degrees from Chang Bunker on our single family tree. Login to see how you relate to 33 million family members.
M > Mont | L > le Strange > Eleanor (Mont) le Strange
Richardson:
"Lady Joan Somery's third husband was Sir Ebal de Mont (or Monts), Knt. (died 1268), of Milton, Cambridgeshire, Ketton, Rutland, etc., co-seigneur of Mont, canton Vaud, Steward of the Household to King Henry III, Constable of Windsor Castle. While Joan had no issue by her 1st and 2nd husbands, Joan and Ebal had one daughter, Eleanor, wife of Sir John le Strange, Knt., 1st Lord Strange of Knockin (died 1309)".
See also her husband John, who has a mother also called Joan Somery.
We ought to double-check the names and connected parents for this family group. And perhaps add some unconfusing , common paragraph to everyone involved?