Where does “харків'янка” come from?

харків'янка (Ukrainian) comes from Belarusian -янка, from Russian -ка, from Proto-Slavic -ьka, from Proto-Balto-Slavic -ikaʔ, from Proto-Indo-European -ikeh₂.

Ancestry of “харків'янка”, step by step

Step	Language	Word	Meaning
1	Belarusian	-янка	—
2	Russian	-ка	now, just
3	Proto-Slavic	-ьka	—
4	Proto-Balto-Slavic	-ikaʔ	—
5	Proto-Indo-European	-ikeh₂	—

Every word from Proto-Indo-European -ikeh₂ →Every word from Russian -ка →Every word from Proto-Slavic -ьka →