Where does “někdo” come from?

někdo (Czech) comes from Czech ně-, from Czech ne, from Old Czech ne, from Proto-Slavic ne, from Proto-Balto-Slavic nē, from Proto-Indo-European né — not; no.

někdo (Czech): someone, somebody

Definitions

someone, somebody

Ancestry of “někdo”, step by step

Step	Language	Word	Meaning
1	Czech	ně-	some
2	Czech	ne	no!; not
3	Old Czech	ne	Negation particle; no, not
4	Proto-Slavic	ne	not
5	Proto-Balto-Slavic	nē	not
6	Proto-Indo-European	né	not; no

Every word from Proto-Indo-European né →Every word from Proto-Balto-Slavic nē →Every word from Czech ně- →