The origin of the family is unknown, though the surnames of Pierre Comeau and his wife Rose Bayol both sound Breton. If the Acadian census records are correct, there was a very big age difference (suggesting that Rose was a second wife) - Pierre was born about 1598, Rose about 1631. In any case they were in Port-Royal (above) by 1656, when Pierre was working there as a cooper. The first few children were born in France, so they were not married in Acadia, as some sources claim. There was a Nicolas Bayol in Acadia as well - perhaps her father or brother; he gave his birthplace as Dijon. We also find an Armand Comeau and an Alexis Comeau in Acadia; very likely Pierre's brothers, but there is no proof.

Pierre and Rose had at least nine children; if his age is correct, he was in his late sixties when the last was born. They were: Étienne (c1651, married Marie-Anne Lefèbvre about 1671, and Marie Landry about 1694 - she is our ancestor via her first husband Laurent Granger); Pierre dit l'Aîné and L'Esturgeon (c1653, married Jeanne Bourg, sister of our ancestor Marie-Jeanne Bourg Béliveau); Françoise (c1656, married Jean Gaudet, whose sister Marie Gaudet Hébert is our ancestor); Jean (1657, married Françoise Hébert; two of her sisters are also our ancestors); another Pierre (1658, married Jeanne Bourgeois, sister of our ancestor Germain Bourgeois); Antoine (1661); Marie-Anne (1664, married Étienne Rivet); and Jean-Augustin (1665, married Catherine Babin, sister of our ancestor Jeanne Babin Richard).

Jean Comeau and Françoise Hébert were married in Port-Royal about 1677, and had fifteen children: Marie (1678, married Pierre Girouard); Étienne (1680, married Marguérite Forest and Élisabeth Levron); Pierre (1680, married Suzanne Bézier); Jean-Baptiste (1683, married Anne-Marie Thibodeau); Anne-Marie (1685, married François Richard); Marguérite (1687, married Ambroise Melançon); Augustin (1688, married Jeanne Levron dit Nantais); Claude (1690); François (1691-1717, married Marie-Jeanne Soulard ; Françoise (1694-1717, married Jean-Baptiste Soulard); Alexandre (1695, married Marie Bertrand); Madeleine (1697, married Pierre Trahan); Marie-Charlotte (c1702, married Jean Trahan); Joseph (1703, married Brigitte Levron and Madeleine Girouard); and Anne-Judith (1705, married René Giscé). After Françoise died, Jean married Catherine Joseph in 1720; no children.

For Anne-Marie's descendants, see Richard.