Want to know about the strong connection between Scotland and France ? and how your ancestors might have been citizens of both countries ? 

Scotland and France’s Auld Alliance (1295) was a military and diplomatic alliance drawn up by John Balliol of Scotland and Philip IV of France, which benefited most ordinary Scots, who got jobs as mercenaries in France’s armies and a steady supply of fine French wines.

For example, the Battle of Agincourt (1415) was a disaster for the French Dauphin, who turned to the Scots, England’s traditional enemy, for help : 12,000 Scots boarded ships bound for France and defeated the English army at the Battle of Baugé (1421). 

Many Scots remained in France, joining Joan of Arc at Orleans, later forming the Garde Écossaise of the French Kings. Due to this special relationship, Scottish merchants had the privilege of selecting the finest wines for themselves (leaving English wine-drinkers with some inferior produce), although the Reformation limited trade between Protestant Scotland and Catholic France to claret (generally avoiding taxes after the English-Scottish Union). The marriage of François II, the French dauphin, and Mary (Stuart,) Queen of Scots, enabled the alliance to grant dual citizenship in both countries (i.e. dual nationality to the French in Scotland and the Scots in France), but this was eventually revoked by the French government in 1903.

A discussion of this will be found here : https://en.wikipedia.org/wiki/Talk%3AAuld_Alliance

Note : "auld" is the Scottish way of writing "old"; the pronunciation is different ('o:ld', not 'ould'), so is the meaning sometimes; "an auld alliance" cannot be old at its beginning !, this phrase simply mean that it is primeval (l'alliance primitive, l'alliance des débuts).