Where does “Lekki” come from?

Lekki (Polish) comes from Old Polish lekki, from Proto-Slavic lьgъkъ, from Proto-Indo-European h₁lengʷʰ- — light.

Ancestry of “Lekki”, step by step

Step	Language	Word	Meaning
1	Old Polish	lekki	—
2	Proto-Slavic	lьgъkъ	light
3	Proto-Indo-European	h₁lengʷʰ-	light

Lekki — Etymology, Origin & Word History | Etymology Explorer