Where does “saturnin” come from?

saturnin (Middle English) comes from Old French saturnin, from Latin Sāturnīnus, from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “saturnin”, step by step

saturnin traces back through two separate lines of ancestry.

via Old French saturnin

StepLanguageWordMeaning
1Old Frenchsaturnin
2LatinSāturnīnus
3Latin-īnusof or pertaining to; -ine
4Proto-Italic-īnosof/belonging to
5Proto-Indo-European-iHnosCreates adjectives of materials
6Proto-Indo-European-no-adjectival suffix

via Old French saturnine

StepLanguageWordMeaning
1Old Frenchsaturnine
Every word from Proto-Indo-European -no-Every word from Latin -īnusEvery word from Proto-Italic -īnos