Where does “Treatyist” come from?

Treatyist (English) comes from English treaty, from Middle English trete, from French traité, from French traiter, from Middle French traicter, from Old French traiter, from Latin tractāre, from Latin tractō — Derives action nouns from verb roots.

Ancestry of “Treatyist”, step by step

Treatyist traces back through two separate lines of ancestry.

via English treaty

StepLanguageWordMeaning
1EnglishtreatyA binding agreement concluded by subjects of...
2Middle Englishtrete
3Frenchtraitétreatise
4Frenchtraiterto treat; to take care; to process, spray, coat
5Middle Frenchtraicterto treat
6Old Frenchtraiter
7Latintractāre
8Latintractōto tug, drag or haul
9Latin-tōForms here
10Latin-tusForms the past participle of verbs; Forms...
11Proto-Italic-tus
12Proto-Indo-European-tusDerives action nouns from verb roots

via English ist

StepLanguageWordMeaning
1EnglishistA practitioner or supporter of an ism
2English-istAdded to words to form nouns denoting
3Old French-iste
4Latin-ista-ist; one who practises or believes
5Ancient Greek-ιστήςAlternative form of -τής; -ist
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Proto-Hellenic-tās
Every word from Proto-Indo-European -tusEvery word from Latin -tusEvery word from Latin -tō
Treatyist — Etymology, Origin & Word History | Etymology Explorer