Where does “so-called” come from?

so-called (English) comes from English So, from English Sol, from Old French sol, from Latin solidum, from Latin solidus, from Proto-Italic soliðos, from Proto-Indo-European solh₂-i-dʰ-o-s, from Proto-Indo-European solh₂- — whole.

so-called (English): So named; commonly called by such a name, often...

Definitions

  1. So named; commonly called by such a name, often...

Ancestry of “so-called”, step by step

so-called traces back through two separate lines of ancestry.

via English So

StepLanguageWordMeaning
1EnglishSoA Mon-Khmer-speaking people of Laos and Thailand;...
2EnglishSolThe Sun, the star orbited by the Earth
3Old Frenchsolalone; sol; Old French coin
4Latinsolidumsolid
5Latinsolidussolid; A solidus: a Roman ~23-carat gold coin...
6Proto-Italicsoliðos
7Proto-Indo-Europeansolh₂-i-dʰ-o-sentire
8Proto-Indo-Europeansolh₂-whole

via English called

StepLanguageWordMeaning
1Englishcalledsimple past tense and past participle of call
Every word from Proto-Indo-European solh₂-Every word from Proto-Indo-European solh₂-i-dʰ-o-sEvery word from Proto-Italic soliðos