Where does “Brikcí” come from?

Brikcí (Old Czech) comes from Latin Brictius, from Gaulish Brikkos, from Proto-Celtic brikkos, from Proto-Indo-European perḱ-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “Brikcí”, step by step

Step	Language	Word	Meaning
1	Latin	Brictius	—
2	Gaulish	Brikkos	—
3	Proto-Celtic	brikkos	speckled, spotted
4	Proto-Indo-European	perḱ-	colored; motley; to open, rip up
5	Proto-Indo-European	per-	before, in front; first; to go through
6	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Proto-Indo-European perḱ- →