Stephenson Family Tree » Isabeau de Marly de Montmorency (1243-1292)

Personal data Isabeau de Marly de Montmorency 

  • She was born in the year 1243 in Montmorency, Val-d'Oise, Île-de-France, France.
  • She died on September 3, 1292 in Florensac, Hérault, Occitanie, France, she was 49 years old.
  • She is buried on September 4, 1292 in Florensac, Hérault, Occitanie, France.
  • This information was last updated on October 20, 2023.

Household of Isabeau de Marly de Montmorency

(1) She is married to Robert IV do Poissy.

They got married before 1260 at France.


(2) She is married to Guillaume de Beaumont.

They got married in the year 1265, she was 22 years old.


(3) She is married to Guy III de Lévis-Mirepoix.

They got married on June 9, 1269 at Aude, Languedoc-Roussillon, France, she was 26 years old.

Do you have supplementary information, corrections or questions with regards to Isabeau de Marly de Montmorency?
The author of this publication would love to hear from you!


With Quick Search you can search by name, first name followed by a last name. You type in a few letters (at least 3) and a list of personal names within this publication will immediately appear. The more characters you enter the more specific the results. Click on a person's name to go to that person's page.

  • You can enter text in lowercase or uppercase.
  • If you are not sure about the first name or exact spelling, you can use an asterisk (*). Example: "*ornelis de b*r" finds both "cornelis de boer" and "kornelis de buur".
  • It is not possible to enter charachters outside the standard alphabet (so no diacritic characters like ö and é).

The data shown has no sources.

Historical events

Day of death September 3, 1292

Day of burial September 4, 1292



Same birth/death day

Source: Wikipedia


About the surname De Marly

  • View the information that Genealogie Online has about the surname De Marly.
  • Check the information Open Archives has about De Marly.
  • Check the Wie (onder)zoekt wie? register to see who is (re)searching De Marly.

The Stephenson Family Tree publication was prepared by .contact the author
When copying data from this family tree, please include a reference to the origin:
Brian K. Stephenson , "Stephenson Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/stephenson-family-tree/I133717.php : accessed May 6, 2025), "Isabeau de Marly de Montmorency (1243-1292)".