Note: dit Poitevin refers to his ancient and ancestral Barbeau family line location of Poitou France. It might also include a Poitevin family surname from the same region inner connected. 
Note: The French identifier dit Poitevin is identifying something about the person or person's family. It is not a (royal or noble) conveyance such as de or du. It is not an alias, nickname or last name which are incorrect English translations!
French "dit" or "dite" names were identifiers used by French families, that describe or distinguish the person based on a variety of possible definitions including French surname linage, maiden name genealogy, geography, guilds, master craftsmanship, military loyalties, seigneur relationships, military status ...etc etc etc
The Old World French never referred to dits as "last names", "nick names" or "aliases."
Many French , Nouvelle France and Louisanne families carried their dit identification from their origins in France, Netherlands and Britain when they migrated to North America.
Eventually most dit and dite identifiers use were dropped as families became nationalized in North America and discontinued in France after the French Revolution.Baraboo-1 16:28, 16 February 2018 (EST)
Joseph Barbeau dit Poitevin 1
Il est aussi connu sous le nom de Jean Barbeau 3 et Joseph Barbot 2.
Il est le fils de Étienne Barbeau 4 et Marie Martinelle 4.
Il nait en Poitou, France 4. Il épouse Élisabeth Charbonneau, fille de Olivier Charbonneau et Marie-Marguerite Garnier le 12 juin 1690 à Lachenaie, Lanaudière, Québec, Canada 4, 9.
Liste de ses enfants connus:
1. Julienne Barbeau ( - 1710) 6 (de Élisabeth Charbonneau)
+ 2. Jean-Baptiste Barbeau (1693 - ) 7 (de Élisabeth Charbonneau)
+ 3. Marie-Madeleine Barbeau (1698 - ) 5 (de Élisabeth Charbonneau)
+ 4. Michel Barbot (1699 - 1728) 8 (de Élisabeth Charbonneau)
5. Marie-Thérèse Barbeau (1701 - ) 6 (de Élisabeth Charbonneau)
6. Joseph Barbeau (1703 - 1703) 6 (de Élisabeth Charbonneau)
7. Marie-Élizabeth Barbeau (1705 - 1705) 6 (de Élisabeth Charbonneau)
8. Joseph Barbeau (1707 - 1707) 6 (de Élisabeth Charbonneau)
Note: Thank you to Nancy Cousins for creating WikiTree profile Barbeau-80 through the import of CussonHawkinsHillHughesSurrell.ged on Jul 29, 2013.
Birth according to one source .. about 1665 Poire-sur-Vie,La Roche sur Yon,Vendee,France Occupation Source: Note: Farmer
Joseph Barbeau Poitevin. 
The Church of Jesus Christ of Latter-day Saints, "Ancestral File," database, FamilySearch (https://familysearch.org/ark:/61903/2:1:M125-612 : accessed 2016-11-28), entry for Joseph Barbeau Poitevin.
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On 5 Apr 2015 at 19:34 GMT Denis Givogue wrote:
On 14 Aug 2014 at 17:07 GMT Nancy Lee (Hill) Cousins wrote:
Joseph is 16 degrees from Elinor Glyn, 21 degrees from Frances Weidman and 20 degrees from Victoria of the United Kingdom of Great Britain and Ireland on our single family tree. Login to find your connection.