Where does “uppies” come from?

uppies (English) comes from English uppy, from English -y, from Middle English -y, from Old English -iġ, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “uppies”, step by step

uppies traces back through 3 separate lines of ancestry.

via English uppy

StepLanguageWordMeaning
1EnglishuppyThe act of being held up, e.g. carried on one's parent's shoulder or back
2English-yAdded to nouns and adjectives to form adjectives...
3Middle English-yDesignates an adjective, in many cases formed by...
4Old English-iġ-y, -ic
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic

via English S

StepLanguageWordMeaning
1EnglishSThe ordinal number nineteenth, derived from this...

via English ies

StepLanguageWordMeaning
1Englishiesplural of i, the name of the letter I
Every word from Proto-Indo-European -ḱos →Every word from English -y →Every word from Old English -iġ →