Where does “chełmianka” come from?

chełmianka (Polish) comes from Polish chełmianin, from Polish Chełm, from Proto-Slavic xъlmъ, from Proto-Germanic hulmaz, from Proto-Indo-European kl̥Hmos, from Proto-Indo-European ḱelH- — to freeze.

Ancestry of “chełmianka”, step by step

StepLanguageWordMeaning
1Polishchełmianin—
2PolishChełm—
3Proto-Slavicxъlmъhill
4Proto-Germanichulmazsmall island, hill, mound
5Proto-Indo-Europeankl̥Hmos—
6Proto-Indo-EuropeanḱelH-to freeze
Every word from Proto-Indo-European ḱelH- →Every word from Proto-Indo-European kl̥Hmos →Every word from Proto-Germanic hulmaz →