LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Tantasius

Tantasius m sg (genitive Tantasiī or Tantasī)
Classical[tanˈta.si.ʊs]Ecclesiastical[tanˈtaː.s̬i.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularLucius Tantasius, a Roman man slained by Catilina

Declension

declension
formsingularplural
nominativeTantasius—
genitiveTantasiī
Tantasī		—
dativeTantasiō—
accusativeTantasium—
ablativeTantasiō—
vocativeTantasī—

Quick answers

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