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).
- ● 1370 Rossi (gen) Livi 257;
1527 Rossus (nom) Rome1527 p. 83
- ● 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 2020, no. 1. http://dmnes.org/2020/1/name/Rosso.