« Reply #3 on: Thursday 18 May 17 21:43 BST (UK) »
The International Red Cross have a list of both military and civilian internees/prisoners of war. Here is the link to start the simple surname search, which will take you to a further page where you need to choose nationality, etc. Unfortunately, I don't know whether there's a simple name list or any additional information about the individuals.
https://grandeguerre.icrc.org/
Aberdeen: Findlay-Shirras,McCarthy: MidLothian: Mason,Telford,Darling,Cruikshanks,Bennett,Sime, Bell: Lanarks:Crum, Brown, MacKenzie,Cameron, Glen, Millar; Ross: Urray:Mackenzie: Moray: Findlay; Marshall/Marischell: Perthshire: Brown Ferguson: Wales: McCarthy, Thomas: England: Almond, Askin, Dodson, Well(es). Harrison, Maw, McCarthy, Munford, Pye, Shearing, Smith, Smythe, Speight, Strike, Wallis/Wallace, Ward, Wells;Germany: Flamme,Ehlers, Bielstein, Germer, Mohlm, Reupke