Dear Newsgroup ~
Now that we know that Clémence de Mayenne can't have been the daughter
of Isabel de Meulan, it sets off some other problems in the
established and accepted lineage of her ancestry.
Various secondary sources state without citation that Clémence de
Mayenne's father, Geoffroi de Mayenne (living 1168), married (1st)
Constance of Brittany, daughter of Conan III, Duke of Brittany.
Usually no date for the marriage of Geoffroi and Constance is given.
Most sources assign Geoffroi and Constance only one daughter, Maud,
and very few include a son, Hamon. I found one modern historian that
included Hamon, but he called him Hamelin by mistake! The fact is
Geoffroi and Constance had three children, a son, Hamon, and two
daughters, Maud and Clémence.
The question is: When were Geoffroi and Constance married? Surely
they were married before 1140, as their son and heir apparent, Hamon,
was a knight in 1158, when he accompanied his father that year on
crusade to the Holy Land. I've already cited a source and weblink for
that information.
Argentré's Histoire de Bretagne (1668): 155 directly addresses the
issue of Geoffroi and Constance's marriage. See the following weblink
for that source:
http://books.google.com/books?id=ApelLzfcHY0C&pg=PA155
Argentré says they were married in or about 1135. He also says that
Constance was the younger daughter of Conan III, Duke of Brittany.
“Conan vescut depuis en paix, fors quelque different avec Robert Baron
de Vitré, qui interuint en l’an mille cent trente cinq, pour
l’injustice, que ce Baron faisoit à ses sujets, & la plainte, laquelle
venoit au Duc de l’oppression qu’il leur faisoit. Ce que refusant le
sieur de Vitré de reparer, le Duc Conan delibera de l’y contraindre
par armes : & de fait se mist aux champs, & entra en la ville de
Vitré, où il trouva Emme, femme de Robert, à laquelle il donna congé
de se retirer avec son fils. Ce Seigneur ainsi chatlé de sa terre,
fut contraint de se retirer au Baron de Fougeres, duquel il fut
recueilly quelque temps : mais Conan gagne le sieur de Fougeres luy
donnant la terre de Gahart, & quelque part des forests de Rennes : qui
fut cause, qu'il donna congé audit de Vitré, lequel se retira vers
Iuhael, sieur de Mayenne : ce que voyant Conan, donna sa fille
Constance, la plus jeune des siennes, en mariage à Geoffroy, fils
dudit Iuhael: & par mesme moyen, luy donna en dot la Baronnie de
Vitré, qui fut cause que ledit de Vitré fut constraint encore se
retirer de là, s’en allant à refuge devers le sieur de Laval, qui
estoit son cousin germain, car ils estoient naiz de deux soeurs :
duquel lieu il fist la guerre à ceux qui renoient la ville de Vitré, &
se retiroit en deux chasteaux, l’un appellé de Launay, & l’autre de la
Gravelle..” END OF QUOTE.
Obviously if Geoffroi and Constance had a son, Hamon, who was a knight
in 1158, they must have started having children no later than say
1140. So the presumption is made that Geoffroi and Constance were
both of marriageable age in 1135, which for this class of family would
be ages 12 to 15 at marriage. This should mean that Geoffroi and
Constance were born say 1120-1123, give or take.
To help verify that Clémence de Mayenne was the child of Geoffroi de
Mayenne and his 1st wife, Constance of Brittany, I've checked the
chronology of Clémence's descendants and compared it against the
chronology of her younger half-brother, Juhel de Mayenne (son of
Isabel de Meulan). Under normal circumstances, if Clémence was born
to an earlier marriage of her father, the chronology of her
descendants should run earlier than that of the descendants of
Clémence's half-brother, Juhel de Mayenne. To check the chronology, I
used Charles Cawley's Medlands database. While not perfect, Cawley
gives enough information to get a fairly good fix on approximate dates
for the various Mayenne family descendants. As expected, the
chronology of the later descendants of Clémence definitely runs ahead
of the descendants of Juhel de Mayenne. No surprise there.
So far I have yet to find a contemporary record which states exactly
when Geoffroi and Constance were married. I assume, however, that
Argentré based his statement on an earlier Breton chronicle.
Presuming that Geoffroi de Mayenne was born c. 1120-1123, that leads
to various chronological problems with his family. All sources seem
to be unanimous that Geoffroi de Mayenne's parents were Juhel de
Mayenne and his wife, Clémence of Ponthieu. And all sources seem to
be unanimous that Clémence of Ponthieu's parents were Guillaume, Count
of Ponthieu (died 1171), and his known wife, Ela of Burgundy.
But Count Guillaume and his wife, Ela, are thought to have married
shortly after 1112. If so, it would impossible for their daughter,
Clémence, to give birth to her son, Geoffroi de Mayenne, born c.
1120-1123.
The date of the marriage of Count Guillaume and his wife, Ela of
Burgundy, is discussed by Kathleen Thompson in her well written
article, "William Talvas, Count of Ponthieu, & the Politics of the
Anglo-Norman Realm," published in Bates & Curry, England & Normandy in
the Middle Ages (1994): 171. This article may be viewed at the
following weblink:
http://books.google.com/books?id=_2ydotlxKeUC&pg=PA171&lpg=PA171
She says that Count Guillaume and Ela of Burgundy were married
"shortly after 1112." Thompson qualifies this statement by a footnote
which indicates that Ela of Burgundy's first [previous] marriage took
place in 1095 [see C. de Vic & D. Vaissete, Hist. générale de
Languedoc, ed. A. de Mege (Toulouse, 1840–46), iii. no. 268, pp. 602–
603]. She states that Dr. Keats-Rohan suggests that Orderic may have
confused Ela and her aunt of the same name, so that William did not in
fact marry [Bertrand] the count of Tripoli’s widow [see K. Keats-
Rohan, ‘The Prosopography of Post-Conquest England: Four Case
Studies,’ Medieval Prosopography 13 (1993): 41].
Below is a weblink to the cited marriage contract of Bertrand, Count
of Toulouse, and "Helene" of Burgundy dated 1095 published by Vic and
Vaissete:
http://books.google.com/books?id=-yFeAAAAIAAJ&pg=PA602
If Ela of Burgundy was not the widow of Bertrand, Count of Toulouse
(died 21 April 1112) [he is the Count of Tripoli], then obviously her
marriage to Count Guillaume could have taken place well before c.1115,
and that would alleviate the impossible chronology that occurs
otherwise. Either that solution, or Ela of Burgundy is not the mother
of Clémence of Ponthieu.
I haven't seen Keats-Rohan's comments about Ela of Burgundy. However,
I suspect she didn't know about the tight chronology between the 2nd
marriage of Ela of Burgundy and the birth of her grandson, Geoffroi de
Mayenne. Assuming Argentré has correctly dated the marriage of
Geoffroi de Mayenne and Constance of Brittany as 1135, then something
has to give way in the Ponthieu chronology or pedigree.
For interest's sake, the following is a weblink to the Wikipedia
version of the biography of Ela of Burgundy's alleged first husband,
Bertrand, Count of Toulouse (died 1112):
http://en.wikipedia.org/wiki/Bertrand,_Count_of_Toulouse
If someone has access to the Keats-Rohan article, I'd appreciate very
much if they would post the salient points of her article here on the
newsgroup. I assume she had some good reason for doubting that Ela of
Burgundy was the widow of Bertrand, Count of Toulouse.