Where does “Джефферис” come from?

Джефферис (Russian) comes from English Jefferies, from English Jeffries, from English -s, from English ’s, from English Kingstown, from English town, from Middle English toun, from Middle English ende — on, onto.

Ancestry of “Джефферис”, step by step

StepLanguageWordMeaning
1EnglishJefferies
2EnglishJeffries
3English-sUsed to form regular plurals of nouns; Used to...
4English’s
5EnglishKingstownOS grid ref NY3959
6EnglishtownA settlement; an area with residential districts,...
7Middle Englishtountown
8Middle EnglishendeThe end or finishing of a thing; the terminal...
9Old Englishendeend, limit, border, corner
10Proto-Germanicandiin addition, furthermore, and
11Proto-Indo-Europeanh₂éntiopposite; near; in front
12Proto-Indo-Europeanh₂éntsforehead; front
13Proto-Indo-Europeanh₂ent-face; forehead; front
14Proto-Indo-Europeanh₂en-on, onto
Every word from Proto-Indo-European h₂en-