Iansenius

== Latin == === Alternative forms === Jansenius === Etymology === From Dutch Jansen + Latin -ius. === Pronunciation === (Classical Latin) IPA(key): [jãːˈsɛ.ni.ʊs] (modern Italianate Ecclesiastical) IPA(key): [janˈsɛː.ni.us] === Proper noun === Iansenius m sg (genitive Ianseniī or Iansenī); second declension (New Latin) a surname from Dutch — famously held by: Cornelius Jansen (1585–1638), Dutch Catholic bishop and theologian. ==== Declension ==== Second-declension noun, singular only. 1Found in older Latin (until the Augustan Age).