Research Notes:

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. 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", 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". 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. ²