Where does “Ziemian” come from?

Ziemian (Polish) comes from Polish ziemia, from Proto-Slavic zemľa, from Proto-Balto-Slavic *źémijāˀ, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

Ancestry of “Ziemian”, step by step

StepLanguageWordMeaning
1Polishziemiaearth; land, ground, soil
2Proto-Slaviczemľaearth, soil; land
3Proto-Balto-Slavic*źémijāˀearth
4Proto-Indo-Europeandʰéǵʰōmearth
5Proto-Indo-European-ōmemphatic suffix or postpositive particle
6Proto-Indo-European-mi—
Every word from Proto-Indo-European -mi →Every word from Proto-Indo-European -ōm →Every word from Proto-Indo-European dʰéǵʰōm →