Due to the genealogical tale the family descends from Dunaghe Mangarmov of Scottish origin, he was a mercenary and was recruited to regiment under the command of William Grim, later under captain-rittmeister Jacob Shaw in Irish company. First in the Polish-Lithuanian service, but during the siege of the fortress of Bely in 1614 his regiment switched sides, surrendered the fortress and took service with Russia. Later regiment participated in several Russo-Crimean Wars against Crimean–Nogai raids. It is possible that they are the same with major Macgermerie/Montgomery, who was a Scottish officer in Swedish service since 1629 in several regiments. He probably served at the Battle of Wittstock in 1636. In 1639 he became a lieutenant in Robert Monroe's recruited infantry regiment before transferring to Alexander Cunningham's recruited regiment. Due to Ed. Furgol this is probably the man who served in the Earl of Eglinton's Horse in the Army of the Solemn League and Covenant in 1644. Since 1655 back in Polish-Lithuanian service at Thorn city with Colonel Cranston's regiment and later in Russia, in Patrick Gordon's Regiment of Horse. Major Macgermerie-Montgomery was at a party at Patrick Gordon's house, quarreled with his host and had to duel with him. His son Yakov was moved to Samara Fortress, that was a front line post protecting the then easternmost boundaries of Russia from forays of nomads under command of voivode Afanasii von Vissinov.