Baillon, Daneborc, Tanebor, Taneborc, Tanebre, Taneburc, Taneburgh, Tarebron, Tenabroc, Teneborc, Thanebourc
Wolfram gives the name Clarischanze to the countess of Tenebroc.
The name is a French variation of Edinburgh. It was the location of a tournament in the latter days of Arthur’s reign, mentioned in the Vulgate Mort Artu. Lancelot was unable to attend because of a wound. Malory places the same tournament at Camelot or Winchester.