Целус/Caelus sounds like "A moustache is not damaged" (Цел ус). A bit less so in Belarusian Цэлус/Цэлы вус, but the tendency shows. This would be the only name of a planet sounding like a phrase (as of now, there are no phrases that form puns with planet names in Russian).
And even this is a forced pun as the phrase and the name of deity have stresses on different syllables.
And even this is a forced pun as the phrase and the name of deity have stresses on different syllables.