It has long been contended that the Gaston family are descendants of Gaston de Foix, Duke de Nemours. The early Gastons truly believed this to be true, which is why the story continues to circulated.
However there is little evidence to verify those early beliefs. There is no evidence to suggest that Gaston de Foix had any children, in fact some sources state that he died without issue.
Gaston de Foix died in 1512, and John "Jean" Gaston was born about 1600, which leaves a 88 year gap in which no known ancestry or descendency is known to exist.
So while there might be connection between Gaston de Foix and John "Jean" Gaston, more research will have to be done before one can say for certain that connection exists.
John "Jean" Gaston was born circa 1600 at
France; born in the Alsace-Lorraine area of France.
John, or Jean, Gaston is said to be a French Huguenot, who emigrated to Scotland. Howeverr much of the Hugeunot persecution in France happened prior to John's birth, so it is possible that John was not born in France, but rather in Scotland. The French Wars of Religion started in 1562, sparked by the Massacre of Vassey. The St. Bartholomew's Day Massacre took place on August 23, 1572. These wars between Catholic and Hugeunot forces finally came to an end with the Edict of Nantes which took place in 1598. He married
Agnes (?) of Navarre. John "Jean" Gaston died in 1670 at
Scotland.