Otho

Probably an Etruscan name, of unknown meaning, maybe a numeral, cfr. 𐌇𐌖𐌈 (huth), "six" (or "four"); compare Latin personal names like Quintus, Sextus, Septimus, Octavius, Decimus and others. (Can this⁽⁺⁾ etymology be sourced?) Rendered in Ancient Greek as Ὄθων.

• (Classical) IPA^(key): /ˈo.tʰoː/, [ˈɔt̪ʰoː]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈo.to/, [ˈɔːt̪o]

Othō m sg (genitive Othōnis); third declension

1. A Roman cognomen — famously held by:
   1. Lucius Roscius Otho, a Roman tribune
   2. Marcus Salvius Otho, a Roman emperor

Third-declension noun, singular only.

• Othōniānus

• “Otho”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• Otho in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.