Where does “صاحب” come from?

صاحب (Old Turkic) comes from Arabic صَاحِب, from Arabic صَحِبَ, from Arabic ح — ب; ج.

Ancestry of “صاحب”, step by step

Step	Language	Word	Meaning
1	Arabic	صَاحِب	companion
2	Arabic	صَحِبَ	to be a companion; to accompany, to be one's...
3	Arabic	ح	ب; ج