Lactantius

• Lact. (abbreviation)

From lactāns (“suckling”) +‎ -ius.^[1]

• (Classical Latin) IPA^(key): [ɫakˈtan.ti.ʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [lakˈt̪an.t̪͡s̪i.us]

Lactantius m sg (genitive Lactantiī or Lactantī); second declension

1. A masculine cognomen — famously held by:
   1. Lucius Caecilius Firmianus Lactantius (circa AD 250–325), a celebrated father of the Church, famous for the purity of his Latin style, and sometimes called the Christian Cicero

Second-declension noun, singular only.

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

• French: Lactance

• “Lactantĭus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• Lactantĭus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette, page 881/1.

• Lucius Caecilius Firmianus Lactantius on the Latin Wikipedia.Wikipedia ^la