One woman, two marriages, and the cousins neither family knew they’d made
Jeanne Denot married twice, eleven years apart, to two men who never appear in the same sentence anywhere else on this site. One marriage’s line runs to Philorum Oligny; the other’s runs to the woman he married in 1887, Marie-Azilda Bessette. By the time that wedding happened, the bride and groom were already cousins — and the woman responsible for it had been dead for close to two hundred years.
An origin recovered from a scribe’s mistake
Jeanne Denot’s own name is uncertain on the page of her own wedding. On 7 June 1667, at Notre-Dame de Québec, she married André Robidou dit Lespagnol — her first marriage, and the earliest sighted act this project holds for her. The act itself names her “Jeanne le Duc, fille d’Anthoine le Duc et de Catherine [blank]”. Everywhere else in the record she is Denot, and the anomaly has an explanation rather than a hedge: a compiled genealogical database gives her parents as Antoine Denault and Catherine Leduc, which is what the 1667 act actually meant to say. The clerk took the mother’s surname and wrote it onto both the father and the daughter, leaving the mother’s own slot on the page blank. Not a variant spelling — a transposition, the same clerical habit this site has documented elsewhere under other names. Her birth, and everything about her life before that morning in Québec, is undocumented.
Marriage act, André Robidou dit Lespagnol × Jeanne Denot, 7 Jun 1667, Notre-Dame de Québec, sighted · PRDH-IGD family record #2232, compiled · Register 02 rev. 40 · graded Proven as to the marriage itself; the correct assignment of her parents’ names rests on the compiled record and is graded Probable
A second marriage, and a witness who explains himself
Eleven years later, on 16 August 1678 at La Prairie, in an act written in Latin, Jeanne married again — Jacques Surprenant dit Sanssoucy. The marriage gave her a son, Pierre Surprenant, who married Anne Tétu at La Prairie on 27 November 1702. That act names its first witness as “Gabriel Le Mieux, habitant de St-Lambert” — and the name isn’t new to the record. Twelve years earlier, in 1690, a Gabriel Lemieux had married Pierre’s own half-sister, Marie-Jeanne Robidoux, the daughter of Jeanne’s first marriage. Same mother, different fathers — a witness list nobody had explained until the two acts were read side by side. Jeanne Denot’s two families, unconnected by any surname, stood in the same room at her son’s wedding.
Marriage act, Jacques Surprenant dit Sanssoucy × Jeanne Denot, 16 Aug 1678, La Prairie (Latin), sighted · marriage act, Pierre Surprenant × Anne Tétu, 27 Nov 1702, La Prairie, sighted · Register 03 rev. 81 · graded Proven
Two lines, one wedding
Both marriages run downhill toward the same event. The Robidou line runs down to Philorum Oligny himself. The Surprenant line runs down to the woman he married in 1887, Marie-Azilda Bessette. Every joint on both routes is sighted — no compiled act carries either chain, which is not true of the closer relationship discussed below, one generation nearer and resting on weaker ground.
To Philorum Oligny — through the Robidou daughter
Register 02 rev. 40–41 · Register 01 §3.32 · eight generations, Jeanne Denot to Joseph Philorum Oligny · graded Proven end to end. The one joint that stood compiled — the 1690 Robidoux × Lemieux marriage, resting on a single database record — is itself now a sighted act, closing the last gap in this chain.
To Marie-Azilda Bessette — through the Surprenant son
Register 03 rev. 81 · seven generations, Jeanne Denot to Joseph Philorum Oligny — one fewer than the Robidou route, which is part of why the two lines meet as fifth cousins once removed rather than as straight fifth cousins · graded Proven end to end, every joint sighted
Cousins already, one generation before 1912
Philorum Oligny descends from Jeanne Denot twice over: once through the Robidou line above, and again through her Surprenant line, by a different grandson — Michel, not Joseph, and not carried on this page. Marie-Azilda descends from her only the once, through Joseph. Because Philorum reaches the shared couple by two routes and Marie-Azilda by one, the two of them descend from Jeanne Denot and Jacques Surprenant dit Sanssoucy as a full couple, not a half-relationship built on one spouse alone — a distinction the project got wrong on first count and corrected before it was ever published. Computed by the same ancestor-set intersection used everywhere else on this site, independently validated by reproducing the project’s already-known figures to the digit before this result was entered, the answer is fifth cousins once removed.
That is not the closest kinship in the family, and this page isn’t the place that finding belongs. The nearer relationship — fourth cousins once removed, one generation closer — runs through Jeanne Denot’s own son and daughter-in-law, Pierre Surprenant and Anne Tétu, and it is graded only Probable, because the joint that closes their shorter route is a grandson’s 1713 baptism surviving solely as a nineteenth-century copy. Nothing on Jeanne Denot’s own two marriages carries that weakness. Every act on both of her lines, above, is sighted.
Register 01 §3.32, rev. 63 · cousin degrees computed by ancestor-set intersection over the project GEDCOM, entered 29 Aug 2026, method independently validated against the project’s own 1912-couple figures before use · the two descent chains behind this figure are graded Proven, above; the degree itself carries no lower grade in the register than the acts it is computed from · not to be confused with the closer, Probable-capped fourth-cousin finding one generation nearer, which rests on a different and weaker joint than anything on this page
A convergence inside a convergence
The fourth row of the Surprenant chain above — Joseph Léon Suprenant × Marie-Josèphe Laberge, 22 October 1787 at St-Philippe — carries a second ancestress this site follows, and only one side of that wedding had ever been read. The groom is Jeanne Denot’s own great-grandson. The bride, unrelated to her by any name, is Catherine Fourrier’s own great-great-great-granddaughter, arriving at the same altar by an entirely separate hundred-and-fifteen-year climb through the Bousquet and Laberge families. Everything below that row — the Bessette generations, the 1887 marriage, Joseph Philorum Oligny himself — descends from both women equally, merged into one line from that single 1787 wedding onward.
Register 03 rev. 81, §3.76 · graded Proven — the marriage act itself names both filiations, and each ancestress’s own climb to it is sighted at every joint
Jeanne Denot never met Philorum Oligny or Marie-Azilda Bessette, and nothing suggests either of their families had any idea what her two marriages, two centuries apart from the wedding they produced, had quietly arranged. She is not one of the eight women this site calls the shared ancestors — her reach runs inside the Oligny line alone, one generation short of the 1912 marriage rather than into it. But the shape of the finding is the same one this whole project keeps turning up: a woman with an uncertain surname on her own wedding act, reappearing seven and six generations later at the wedding of two people who had every reason to think they were strangers.