Where does “παράλληλος” come from?

παράλληλος (Greek) comes from Greek παρά, from Ancient Greek παρά, from Latin verēdus, from Gaulish werēdos, from Proto-Celtic *uɸoreidos — horse.

παράλληλος (Greek): parallel; parallel, line of latitude

Definitions

παράλληλος traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Greek	παρά	despite, in spite of
2	Ancient Greek	παρά
3	Latin	verēdus	A fast or light breed of horse; courier's horse; hunter
4	Gaulish	werēdos	horse
5	Proto-Celtic	*uɸoreidos	horse

Step	Language	Word	Meaning
1	Ancient Greek	ἄλληλος	one another