Lietaud I, seigneur de Marle

Letaldus de Marla is listed by Charles Cawley as the son of Gislebert de Roucy and the brother of Ebles de Roucy, Eudes/Odo "le Fort" and Judith/Iveta/Iueta, Comtesse de Retest.

married Marthilde (perhaps heiress de Coucy), had one daughter Ada de Marle, Heiress of Coucy, who married and divorced, first, Aubry de Beaumont-sur-Oise, Vicomte de Coucy, and second, Enguerrand [I] Comte d´Amiens, Seigneur de Boves et de Coucy.

http://fmg.ac/Projects/MedLands/NORTHERN%20FRANCE.htm#AdaMarleMEngu...:

[LETAUD de Marle . The Genealogiciæ Scriptoris Fusniacensis names "Lebaldus de Malla et…Iveta comitissa de Retest" as brother and sister of "Ebalus de Roceio"[1593].] m MATHILDE, daughter of ---. Elinand Bishop of Laon donations made by "Albricus de Cociaco castro…cum uxore sua Adela et matre eius Malthilde" by charter dated 3 Nov 1059[1594]. [Heiress of Coucy]: assuming that it is correct, as speculated below, that her daughter Ada de Marle was [vicomtesse] de Coucy in her own right, it is possible that the property was inherited from her mother as no record has been found of it belonging to the family of Ada´s father. Létaud & his wife had one child:

a) ADA de Marle . Elinand Bishop of Laon donations made by "Albricus de Cociaco castro…cum uxore sua Adela et matre eius Malthilde" by charter dated 3 Nov 1059[1595]. Her parentage and second marriage are indicated by the Genealogiæ Scriptoris Fusniacensis which names "Letaldus de Marla…filiam nomine Adam" as mother of "Thomam de Marla"[1596], read together with the sources which indicate that Thomas was the son of Enguerrand [I] de Bove Comte d´Amiens. The Chronicle of Alberic de Trois-Fontaines names "filia…Letardi domni de Marla…Ada" as mother of "Thomam de Cocy"[1597]. It is assumed that "Adela" in the first source is the same person as "Ada" in the second and third sources, but this is not beyond all doubt. [Heiress of Coucy]: as Coucy passed from her first husband to her second husband, it is supposed that Ada was heiress of Coucy, although no primary source has yet been identified which confirms that this speculation is correct. m firstly (divorced 1059) AUBRY [de Beaumont-sur-Oise] Vicomte de Coucy, son of [IVES [I] Comte de Beaumont & his wife Emma ---] (-before 1095). m secondly (repudiated) as his first wife, ENGUERRAND [I] Comte d´Amiens Seigneur de Boves et de Coucy, son of DREUX Seigneur de Boves & his wife --- (-[1117]).