Dictionary of Medieval Names
from European Sources

Rosso m. Latin russus 'red'.

Even as late as the third quarter of the 15th C, the etymological origin of the name was still known. In RCCaetani6, 2720, the same man is recorded as both Rubeus and Russius (cf. Rubeus).

Italy
Latin
1527 Rossus (nom) Rome1527 p. 83
Italian
1429–1430 Rosso DiaryLMA p. 239
Cite as: S.L. Uckelman. "Rosso". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Rosso.