Cassini was the surname of a famous family of astronomers, whose members include:

• Giovanni Domenico Cassini a.k.a. Jean-Dominique Cassini, Italian-French astronomer (1625-1712)
• Jacques Cassini, French astronomer (1677-1756), son of Giovanni Domenico
• César-François Cassini de Thury, French astronomer (1714-1784)
• Dominique, comte de Cassini, French astronomer (1748-1845)

The following are named after Giovanni Cassini:

• Cassini crater on Mars
• Cassini crater on the Moon
• Cassini Division, gap between rings of Saturn
• Cassini-Huygens, mission to Saturn and its moons, with one of its two main elements the Cassini orbiter

Other people named "Cassini":

• Oleg Cassini , fashion designer