It comes from Greek Ἰάσων (Iásōn),[1] meaning "healer", from the verb ἰάομαι (iáomai), "heal", "cure",[2] cognate with ἰατρός (iatrós), "healer", "physician".

[3] and Ἰασώ (Iasṓ), the goddess of healing,[4] Forms of related words have been attested in Greek from as far back as Mycenaen (in Linear B) and Arcadocypriot (in the Cypriot syllabary) Greek: 𐀂𐀊𐀳, i-ja-te and i-ja-te-ra-ne, respectively, both regarded as standing for inflected forms of ἰατήρ, "healer".

[5][6][7] The name was borne in Greek mythology by Jason, the great Thessalian hero who led the Argonauts in the quest for the Golden Fleece.

The house of a man named Jason was used as a refuge by the apostle Paul and Silas.

A feminine name that sounds similar is Jacin, derived from the Portuguese-Spanish name Jacinta or the Anglicized version Jacinda, meaning hyacinth.