Where does “jo” come from?

jo (Norwegian Nynorsk) comes from Old Norse jór, from Proto-Germanic ehwaz, from Proto-Indo-European h₁éḱwos, from Proto-Indo-European h₁oh₁ḱu- — swift.

jo (Norwegian Nynorsk): yes; in disagreement with the last speaker's...

Definitions

yes; in disagreement with the last speaker's...

Ancestry of “jo”, step by step

jo traces back through two separate lines of ancestry.

via Old Norse jór

Step	Language	Word	Meaning
1	Old Norse	jór	horse, stallion
2	Proto-Germanic	ehwaz	horse; name of the E-rune
3	Proto-Indo-European	h₁éḱwos	stallion, horse
4	Proto-Indo-European	h₁oh₁ḱu-	swift

via Norwegian Bokmål jo

Step	Language	Word	Meaning
1	Norwegian Bokmål	jo	yes; in disagreement with the last speaker's...
2	Danish	jo	as you know or should know; sometimes vaguely...
3	Old Norse	jaur	—

Words derived from “jo”

storjo

Every word from Proto-Indo-European h₁oh₁ḱu- →Every word from Proto-Indo-European h₁éḱwos →Every word from Proto-Germanic ehwaz →