Draco Malfoy
Many of Draco's relatives on his mother's side of the family (the Blacks) are named for stars or constellations (e.g., Sirius Black, Regulus Black, Andromeda Black Tonks, Bellatrix Black Lestrange, Cygnus Black, Orion Black). Another constellation is Draco (the Dragon). Draco Malfoy eventually named his son for yet another constellation, Scorpius.