1520s, "of Jove," from Late Latin Iovianus, from Latin Iovis (see Jove) + -ian. Meaning "of the planet Jupiter" is recorded from 1794. Classical Latin Iovianus was a masculine proper name.
journeyman
joust
Jove
jovial
joviality
Jovian
Jovicentric
jowl
jowly
joy
Joyce