From the Foundation for Medieval Genealogy:

http://fmg.ac/Projects/MedLands/FRANKISH%20NOBILITY.htm#RoscilleMFoulquesIAnjou

ADALHARD .

m ---. The name of Adalhard's wife is not known.

Adalhard & his wife had two children:

1. Garnier (married Tescenda)

2. Adalhard (became a Bishop)

The French Wikipedia page on Loches, in its Medieval Period History section, gives further information on who Adalhard, or Alalande, was:

http://fr.wikipedia.org/wiki/Loches

En 840, Charles le Chauve nomme Alalande, un de ses lieutenants, gouverneur de Loches. Sa petite-fille Roscille se marie avec Foulque Ier d'Anjou, apportant notamment Loches en dot au comté d'Anjou (887).

In English:

In 840, Charles The Bald named Alalande, one of his lieutenants, as Governor of Loches. His granddaughter Roscille married Foulque I d'Anjou, and her dowry included the County of Loches, which became part of the County of Anjou in 887.