Jupiter lost the "most moons" title a couple of years ago but Saturn just got another 128 tagged on - so now is said to have 274!
www.theguardian.com
(Anybody got some spare Viking deity names?)

Astronomers discover 128 new moons orbiting Saturn
Planet now has 274 moons, almost twice as many as all the other planets in the solar system combined
(Anybody got some spare Viking deity names?)