Obultronius

From obultrōneus (“voluntary, spontaneus”) +‎ -ius.

• (Classical Latin) IPA^(key): [ɔ.bʊɫˈtroː.ni.ʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [o.bul̪ˈt̪rɔː.ni.us]

Obultrōnius m sg (genitive Obultrōniī or Obultrōnī); second declension

1. a Roman nomen gentile, gens or "family name" famously held by:
   1. Obultronius Sabinus, a Roman quaestor

Second-declension noun, singular only.

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