Hi George, I've been assured that Dorroch is the Gaelic phonetic spelling of Dallas, more or less. Im sure if there are any Gaelic speakers out there they can confirm this. Local accents can also help to change the names along with lack of standardised spelling that was common. Interestingly I've looked up the names in a couple of books I've got and they say this about the names.. DALLAS or DOLLAS are names derived from Scottish placenames (although it doesnt mention where). On the map I have there is a Dallas near Forres near the Moray coast which would fit with the note below. Reaney, in his 'Dictionary of English surnames' notes one form of Dallas as being from the old barony of Dallas in Moray. 'Scots kith and kin' notes DALLAS as being from Moray in the C13th a member of the Clan Macintosh, while DARROCH and DARRACH hail from Stirlingshire in the C15th and are of the Clan Macdonald. Hope this is of some use Regards Sara Donaldson in Caithness