Lietgardis de Troyes. There are several hypotheses about the wife of Héribert de Vermandois. See Christian Settipani, La prehistoire des Capetiens 481-987: Premiere Partie, p. 222 n. 218, and Tableau 8. Settipani tentatively suggests Heribert's wife was Lietgardis of Troyes. K. F. Werner in Die Nachkommen Karls des Grossen at V.3 in his Tafel does not identify anyone as Heribert's wife (nor in his discussion of Heribert in his "Untersuchungen zur Fruehzeit des franzoesischen Fuerstentums (9.-10. Jahrhundert): V." in Welt als Geschichte 20 (1960) pp. 93-100). Cf. Medlands.