Where does “cartesiano” come from?

cartesiano (Spanish) comes from New Latin Cartesiānus, from Latin Cartesius — {{w|René Descartes}}.

cartesiano (Spanish): Cartesian

Definitions

Step	Language	Word	Meaning
1	New Latin	Cartesiānus	—
2	Latin	Cartesius	{{w\|René Descartes}}

cartesiano — Etymology, Origin & Word History | Etymology Explorer