Where does “jelen” come from?

jelen (Czech) comes from Old Czech jelen, from Proto-Slavic (j)elenь, from Proto-Indo-European h₁el-en-i-.

jelen (Czech): deer; stag

Definitions

Step	Language	Word	Meaning
1	Old Czech	jelen	—
2	Proto-Slavic	(j)elenь	—
3	Proto-Indo-European	h₁el-en-i-	—

jelen — Etymology, Origin & Word History | Etymology Explorer