This biography was copied in full from Wendy Pitre Roostan's website "The Pitre Trail from Acadia".
"Marc was born c1673 at Port Royal, the fourth child of Jean and Marie.  He is listed in the Port-Royal census of 1686, age 12, living with his parents and 6 siblings. His father died when he was about sixteen but a stepfather fairly quickly appeared. With continuing attacks on Port Royal from New England, perhaps Marc delayed settling down as he did not marry until he was about 26.
Around 1699 he married Jeanne Brun, the eldest child of native Acadians, Sebastien Brun and Huguette Bourg, and who was about three years his junior. In the 1701 census of Port-Royal the newly married couple is listed with their son Claude, age 1. It's certainly possible that they had more than four surviving children, but at this point only the four listed have been traced back to this couple.
They seemed to have settled initially in Port Royal, where two sons were born. Port Royal was again attacked in 1704 so that may have prompted the move south to Cap Sable, as there are no other children of theirs in the Port Royal baptism registers and they next appeared in the 1708 census for Cap Sable. In the 1714 census of Acadia that lay within English control, the couple was listed with two sons and two daughters. This accounts for the four traceable offspring.
According to his declaration at Belle-Ile-en-Mer, their eldest child Claude Marc married at Cobequit in 1724, but it is unknown whether Marc and Jeanne were still alive. Possibly the family moved up to Cobequit in an attempt to escape English-controlled Acadia. The children seemed to have married either in Cobequit or Beaubassin. This would be a path of exile leading eventually to Ile St. Jean for a son and a daughter, and to Miramichi for another son. Their youngest daughter died in Beaubassin at the age of 33. It has been suggested that Marc’s widow Jeanne Brun was a refugee, with their son Jean Marc and his wife Judth Theriot, at Miramichi in 1760." 
Marc passed away after 1714 since he does not appear in any censuses after that year.
Jean PITRE 61, Marie PESELET 45; children: Claude 16, Mare 12, Pierre 9, Jean 6, Francois 4, one girl 2, one girl 1 month.
Marc PITRE 29, Jeanne BOURG (wife); Claude 1; 1 gun, 7 cattle, 4 sheep, 2 hogs.
Marc PITRE and wife, 2 sons, 2 daughters.
BIRTH-MARRIAGE-CHILDREN: Bona Arsenault, HISTOIRE ET GENEALOGIE DES ACADIENS, vols. 1-6; 1630-1775; Quebec, Le Conseil de la Vie Francaise en Amerique, 1965; p. 727 (Port Royal); Univ. of Calif., Berkeley Library, CS31 A77 MAIN. Married around 1700 to Jeanne BRUN. Three children are listed.
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