Dictionary of Medieval Names
from European Sources

Adaleus m. Old High German adal 'noble' + Old Saxon *lēkian, Old High German *leihhen, *leichen 'to dance, sport, play'.

France
Latin
942 Adalei (gen) St-Bernard-Romans 131
Cite as: S.L. Uckelman. "Adaleus". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Adaleus.