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Fun Star Wars name stuff!
Snips
We all know the derivation of Ahsoka's nickname as the snippy padawan, but the word snip can also refer to "an impertinent or saucy girl," as well as a white or light marking. Ahsoka's nickname fits her in so many ways!
Palpatine
Take out the second P, and you end up with palatine, which can be an adjective or a noun, the definitions of which include "possessing royal privileges" and "a feudal lord having sovereign power within his domains." Yep, sounds about right.
Where the heck the name Sheev comes from, I have no idea, except that it's vaguely similar to shiv, and the pointy end of a shiv is absolutely what he deserves. (Ooh, or maybe it's because he shivs the Republic in the back?)
(Definitions from Merriam-Webster online.)