Medicean

adjective2

1. •
   Pertaining to the Medici family.
2. •
   (historical) Designating the four largest moons of Jupiter (Io, Europa, Ganymede and Callisto), as named by Galileo in honour of his future patron Cosimo II de' Medici.

   • Four Medicean stars dance about Jupiter, two Austrian about Saturn, etc., and all (belike) to the music of the spheres. — 1621