Abbius

Uncertain, perhaps the Pre-Latin/Paleo-European substrate hydronym prefix *ab- +‎ -ius, i.e. “of the river”.

• (Classical Latin) IPA^(key): /ˈab.bi.us/, [ˈäbːiʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈab.bi.us/, [ˈäbːius]

Abbius m sg (genitive Abbiī or Abbī, feminine Abbia); second declension

1. a Roman nomen gentilicium or “family name”

Second-declension noun.

¹Found in older Latin (until the Augustan Age).

• Abbius in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.