I don't know if this is relevant but Rubbytown is listed in The Place-Names of Devon, Part 1, Cambs University Press p. 219 and listed under Tavistock is: RUBBYTOWN is Rubes in Woleovis 1488 Rental. Thomas Rubye sold land in 'Woodovyse' to John Brent sometime before 1488. The land he sold is called Smythland and probably was later called Rubbytown or Ruby's (ex inf. Mr J.J. Alexander). Thomas Rubye may well have been of the same family as Roger Rubi, a witness to a charter granting land in a neighbouring district of Foghanger in 1185 (Buckland). For further names of this type, c.f. Sparkaton, Prowtytown infra 231, 148. I have not tried to interpret all the abbreviations but the gist may be useful. There is no mention of Cole Town in the Place-Names of Devon albeit several similar names. HTH Jon