Family tree Kleverlaan » Guillaume I Willem I de Ponthieu (± 910-± 980)

Personal data Guillaume I Willem I de Ponthieu 


Household of Guillaume I Willem I de Ponthieu

(1) He is married to Aliëtte van Normandië.

They got married


Child(ren):



(2) He is married to Mathilde (Maud) van Boulogne (de Gamaches).

They got married about 928.


Child(ren):

  1. Hildun I van Ponthieu  933-1009 
  2. Bernard de Montreuil  ± 934-???? 

Do you have supplementary information, corrections or questions with regards to Guillaume I Willem I de Ponthieu?
The author of this publication would love to hear from you!


Timeline Guillaume I Willem I de Ponthieu

  This functionality is only available in Javascript supporting browsers.
Click on the names for more info. Symbols used: grootouders grandparents   ouders parents   broers-zussen brothers/sisters   kinderen children

Ancestors (and descendant) of Guillaume I Willem I de Ponthieu


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).


Visualize another relationship

The data shown has no sources.

About the surname De Ponthieu


The Family tree Kleverlaan publication was prepared by .contact the author
When copying data from this family tree, please include a reference to the origin:
R. Kleverlaan, "Family tree Kleverlaan", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kleverlaan/I13127.php : accessed March 12, 2026), "Guillaume I Willem I de Ponthieu (± 910-± 980)".