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Dictionary of Medieval Names
from European Sources

Cosmo m. Ancient Greek κόσμος 'order, ordered universe, cosmos'.

The name of a 3rd C martyr, an 8th C saint, an 8th C pope of Alexandria, a 9th C pope of Alexandria and saint, a 10th C pope of Alexandria and saint, a 12th C Italian saint, the birth name of a 15th C pope, and the name of a number of 15th-16th C grand dukes of Tuscany and rulers of Florence.

Finland
Early Modern Swedish
1582 Kuisma Audén1980 p. 171, Kuszma (nom) ibid. p. 171
Italy
Latin
1527 Cosmus (nom) Rome1527 p. 84
Spain
Catalan
1510 Cosme valencia1510 3312
Cite as: R. Le Get, S.L. Uckelman. "Cosmo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 3. http://dmnes.org/2015/3/name/Cosmo.