Where does “Swiftdom” come from?

Swiftdom (English) comes from English DOM, from English dominance, from English -ance, from Middle English -aunce, from Old French -ance, from Latin -ia, from Latin -ius, from Proto-Italic -jōs — Creates adjectives from noun or verb stems.

Ancestry of “Swiftdom”, step by step

Swiftdom traces back through two separate lines of ancestry.

via English DOM

StepLanguageWordMeaning
1EnglishDOMInitialism of date of marriage; Initialism of...
2EnglishdominanceThe state of being dominant; of prime importance;...
3English-anceAdded to an adjective or verb to form a noun...
4Middle English-aunceForms nouns indicating states or processes, usually from verbs or other nouns; -ance
5Old French-anceance (suffix used to form nouns)
6Latin-iaUsed to form a feminine abstract noun, usually...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-Indo-European-yósCreates adjectives from noun or verb stems

via English Swift

StepLanguageWordMeaning
1EnglishSwiftoriginally a nickname for a swift or quick person
2Middle Englishswift
3Old Englishswiftswift, quick
4Old Englishswīfanto revolve, sweep, wend, intervene; to move,...
5Proto-West Germanic*swībanto revolve, to move around
6Proto-Germanicswībanąto revolve; move around; sway; stray; to sweep;...
7Proto-Indo-Europeanswey-to twist, swing; to hiss; whistle; to swing,...
8Proto-Indo-Europeansew-to press out, extract; juice; liquid, rain; to...
Every word from Proto-Indo-European -yós