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d´Udekem d'Acoz
noble family
Wapen van de familie d'Udekem d'Acoz.svg
Coat of Arms
Country Belgium
Current headHenri count d´Udekem d´Acoz
TitlesCount, mostly jonkheer
Estate(s)Losange Castle, Couthof Castle, Raepenburg Castle.[1]
Cadet branches
  • d´Udekem Gentinnes
  • d´Udekem de Guertechin
Losange Castle, private property of the dowager Countess Patrick d’Udekem d’Acoz

The family D'Udekem belongs to the nobility of Belgium since 1816.


The origin of the family Udekem dates back to the Late Middle Ages, with the earliest member dated as dying in 1472. In the 18th century the Dominium of Acoz was obtained via marriage.

Until 2000, the head of the d'Udekem family held the rank of baron. After the wedding of Mathilde d'Udekem d'Acoz with the Duke of Brabant, King Albert II extended the hereditary title of count to the three brothers Henri, Raoul and Patrick d'Udekem d'Acoz and to all their descendants.[2]

Members of the family were active in politics.

Descendants of Charles Joseph baron d'Udekem d'Acoz[edit]

Charles Joseph Marie Ghislain baron (1921) d'Udekem d'Acoz (1885-1968), lord Mayor of Proven

    1. Henri Joseph Adelin François Xavier Marie count (2000) d´Udekem d'Acoz (1933), lord Mayor of Poperinge, married in 2005 to jonkvrouw Marie-Madeleine Kervyn d'Oud Mooreghem (1940)
    2. Raoul Paul Adelin François Xavier Marie count (2000) d´Udekem d'Acoz (1935), local politician
      1. Bernard Marguerite Jean Charles Marie Ghislain count (2000) d´Udekem d´Acoz (1965)[3]
        married in 1998 to jonkvrouw Marie-Pierre Verhaegen (1966), historian[4][5]
        1. 2 sons and one daughter
      2. 3 other daughters.
    3. Patrick Paul François Xavier Marie Ghislain count (2000) d´Udekem d'Acoz (1936-2008), local politician, married in 1971 to Countess Anna Maria Komorowska (1946)
      1. Mathilde countess (2000) d'Udekem d'Acoz (1973), married to Philippe of Belgium (1960)
      2. Jonkvrouw Marie-Alix (1974-1997)
      3. Elisabeth countess (2000) d'Udekem d'Acoz (1977), married to Margrave Alfonso Pallavicini
      4. Hélène countess (2000) d'Udekem d'Acoz (1979), married to Nicolas Janssen, baron Janssen
      5. Charles-Henri count (2000) d'Udekem d'Acoz(1985)


  1. ^ https://www.oostkamp.be/product/479/kastelen-en-herenhuizen
  2. ^ as per royal decree of 8 November 1999, see: Moniteur Belge, 13 November 1999, p.42488
  3. ^ Etat présent de la noblesse belge, 4th series, 2003 /2014
  4. ^ Jean BASTIAENSEN, Prins Filip en prinses Mathilde: Twee families met geschiedenis, Leuven, Van Halewyck, 1999, ISBN 9789056172626
  5. ^ http://www.gva.be/cnt/oid316782/archief-marie-pierre-d-udekem-d-acoz-bekroond-met-prijs-geheim-leger