Torphichen: (Thorphechin 1165 Torfekin 1199) Usually derived Gaelic torr phigheann “magpie hill”, but Gaelic phigheann “magpie” has been shown to be a late borrowing English pie “magpie”. Welsh tref-fechan “small farm” is suggested, but in the absence of early written forms this is speculation.
References
Wilkinson, John Garth, (1992) West Lothian Place Names,Torphin House, Harburn West Lothian, EH55 8RT