Dictionary of Medieval Names
from European Sources

Belladonna f. Latin bella 'beautiful, charming, pleasant' + Italian donna 'lady' from Latin domina 'lady'.

Italy
Latin
1265x1339 Belladona (nom) BBC-Berg 187
Cite as: S.L. Uckelman. "Belladonna". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Belladonna.