Actually the info you have posted regarding our first NA Sirois ancestor is incorrect. Some common errors have occurred as the result of incomplete research and have been perpetuated for many years.
The documentary evidence available on our first Sirois ancestors indicates the following:
The first who we know came to North America was Francois Sirois dit Duplessis. He was likely born about 1680 (at his burial in 1737 the priest estimated his age as 70 and this is a big part of the confusion). There is no indication his name was Jean Francois, this seems to have come from an error in amalgamating his father's name (JEAN) and his name (FRANCOIS). The single strongest piece of evidence for his birth year and his and his father's given names is the record of Francois first marriage. Next a partial translation:
The year 1713 on this 28h day of November, after publication of three banns of marriage in this parish church of Notre-Dame de Liesse, the 5 the 12th and the 19th day of this month
between FRANCOIS SIROIS DUPLESSY, aged 33, son of the late Jean Sirois Duplessy and of Marie Angelique Dumont, his father and mother on......
Since Francois gave his age at the marriage it seems likely much more accurate than a Priest's estimate at his burial. Thus I believe Francois was born about 1680. Francois' father, Jean it seems never came to North America. The marriage record of his son indicates he died before Nov 28, 1713. Despite searching, no records of Jean Sirois and Marie Angelique Therese Dumont,his wife, have ever been found in France. All of the information about them comes from their son Francois' marriage records in Quebec(contract and actual marriage)
you can find more on all of the documents which I am aware of on this first North America Sirois ancestor starting at: http://www.duplisea.com/s_h_s1.htm
if there are any additonal original documents which can shed light on this I would be thrilled to have them come to light.
hope this helps clarify,
Mark Duplisea www.duplisea.com