Where does “unsereins” come from?

unsereins (German) comes from German unsēr, from Middle High German unser, from Old High German unsēr, from Proto-West Germanic unsar, from Proto-Germanic unseraz, from Proto-Indo-European wéy, from Proto-Indo-European éǵh₂ — I.

Ancestry of “unsereins”, step by step

unsereins traces back through two separate lines of ancestry.

via German unsēr

StepLanguageWordMeaning
1Germanunsērour
2Middle High Germanunser—
3Old High Germanunsēr—
4Proto-West Germanicunsarour, ours, of us
5Proto-Germanicunserazour, ours; 1st person plural possessive
6Proto-Indo-Europeanwéywe
7Proto-Indo-Europeanéǵh₂I

via German ein

StepLanguageWordMeaning
1Germaneinone; a, an; indicating motion into something
2Middle High Germaneinone
3Old High Germaneinone; only
4Proto-West Germanicainone
5Proto-Germanicainazone; some
6Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European éǵh₂ →Every word from Proto-Indo-European wéy →Every word from Proto-Germanic unseraz →