Original: At Cosimo's suggestion, Galileo changed the name to Medicea Sidera ("the Medician stars"), honoring all four Medici brothers (Cosimo, Francesco, Carlo, and Lorenzo).
Simplified: At the grand-duke's suggestion, Galileo changed the name to Medicea Sidera ('the Medici stars'), honoring all four Medici brothers (Cosimo, Francesco, Carlo, and Lorenzo).