Wayne asked me once if I sought to apply character names with meanings, adding myth or mystery to enhance with a single word.
The answer was sometimes, but I've paid more attention to it ever since. Wayne is a genius after all.
I wish I could come up with a host of relevant Cassandras this morning, but Mr. Dark in Something Wicked This Way Comes leaps to mind and suffices. You know he's going to be a baaaaaad guy as soon as he presents his buisiness card.
I sometimes use baby name sites to research name meanings and to choose names for my fictional peeps.
And I ran across a rather handy one this a.m., alternativebabynames.com. It doesn't provide name definitions, but it's a clearing house for the offbeat and the exotic including Science fiction names and Goth and Vampire names. It strikes me that both of those are probably better put to use by fiction writers than parents.
If the kid happens to choose different interests and paths in life, a name like Mink or Nightshade might be a bit of a liability in, say, a Congressional campaign ad.