Where does “protectorian” come from?

protectorian (English) comes from English protector, from Middle English protectour, from Anglo-Norman protectour, from Latin prōtector, from Latin prōtegō, from Latin prō, from Latin ratus, from Latin rēōr — to fit, to fix, to put together.

Ancestry of “protectorian”, step by step

protectorian traces back through two separate lines of ancestry.

via English protector

StepLanguageWordMeaning
1EnglishprotectorSomeone who protects or guards, by assignment or...
2Middle Englishprotectour
3Anglo-Normanprotectourprotector
4Latinprōtectorprotector (all senses)
5Latinprōtegōto cover
6Latinprōfor
7Latinratusconsidered, having been considered; established,...
8Latinrēōrto reckon, calculate
9Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
10Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
11Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English ian

StepLanguageWordMeaning
1Englishian
2IrishEoinJohn any of several people in the Bible
3Old IrishIohainJohn apostle
4LatinIōannēsJohn biblical persons
5Ancient GreekἸωάννης
6HebrewיוחנןYahweh is gracious
7Hebrewחנוןgracious, merciful, compassionate; passive...
8Moroccan Arabicخنونةmucus, snot
9Arabicخُنَّة
Every word from Proto-Indo-European h₂er-