Cartesius

Latin

Etymology

Derived from Middle French Descartes, one of several surnames originating in the Reformation period denoting support for the compromise of religious charters for each municipality, indicating adherence to a Catholic or Protestant denomination. Compare also the surname of his mother Brochard and the Germanic variant Broschart, corresponding to pro- (“for, supporting, on behalf of”) +‎ charta (“charter”).

Pronunciation

• (Classical) IPA^(key): /karˈte.si.us/, [kärˈt̪ɛs̠iʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /karˈte.si.us/, [kärˈt̪ɛːs̬ius]

Proper noun

Cartesius m sg (genitive Cartesiī or Cartesī); second declension

1. a surname famously held by:
   1. René Descartes latinized to Renatus Cartesius

Declension

Second-declension noun, singular only.

Case	Singular
Nominative	Cartesius
Genitive	Cartesiī Cartesī1
Dative	Cartesiō
Accusative	Cartesium
Ablative	Cartesiō
Vocative	Cartesī

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