LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Sennius

Sennius m sg (genitive Senniī or Sennī)
Classical[ˈsɛn.ni.ʊs]Ecclesiastical[ˈsɛn.ni.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name", famously held by
  2. masculinesingularSennius Sabinus, a Roman proconsul

Declension

declension
formsingularplural
nominativeSennius—
genitiveSenniī
Sennī		—
dativeSenniō—
accusativeSennium—
ablativeSenniō—
vocativeSennī—

Quick answers

What does Sennius mean in Latin?
Sennius, a proper noun, means “a Roman nomen gentile, gens or "family name", famously held by”.
What is the genitive of Sennius?
The genitive singular is Senniī. Sennius is masculine, second declension.
How do you pronounce Sennius?
In classical Latin, [ˈsɛn.ni.ʊs]; in ecclesiastical (church) Latin, [ˈsɛn.ni.us].