Dictionary of Medieval Names
from European Sources

Aldo m. Old High German alt, Old Saxon, Old Frisian ald 'old', or a pet form of any of various names beginning with this element.

France
Latin
c823 Aldo (nom) irminon-vol2 10, Wan
c823 Aldingus (nom) irminon-vol2 24, Palatiolum
Italy
Latin
1527 Aldelli (gen) Rome1527 p. 90
Cite as: S.L. Uckelman. "Aldo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Aldo.