We have a good idea about the origin of Jans. We know that he was the son of Jean Sauvage & Anne Eon and that he came from the province of Bretagne, France.
On his marriage certificate with Marie-Louise Benoit done on April 8 1782 in the parish of Les Cèdres, Quebec, we can read that he's from the parish of Plouër, Bretagne.
In his two marriage contracts done before J.Gabrion, notary, it is written in the first one dated April 5 1782, that Jans was from the parish of Ploüouard, Dol diocese, Bretagne. In the second one dated September 23 1782, it is said that he's from Ploüard, Dol diocese, Bretagne.
In the book ¨ Nos origines en France, des débuts à 1825. Vol. 13 :Bretagne¨ we can read that he’s the son of Jean Sauvage & Anne (Ayous, Ayrus or Eyon )from the parish of Plouëc today named Plouëc-Du -Trieux, Tréguier diocese, Bretagne.
Dans ¨Les Français au Québec, 1765-1865: un mouvement migratoire méconnu¨ It is said that he originated from Plouer-Langlolay-sur-Rance, Côtes-d'Armor.
He would have arrived in Canada around 1777, maybe from the United States. It is written that there is a possibility that Jans would have arrived in Canada from the Seven years war. We can conclude that he’s from the province of Bretagne, for his native parish we have the name Plouër, Ploüouard, Ploüard, Plouëc, and Plouer-Langlolay-sur-Rance.
Some research in the Plouër registry indicate that there were Sauvage & Eon family living there between 1700-1790. There is still no proof that Jans or his parents ever lived there.