WDYT? Are they too "Star Trek?" I probably wouldn't use both in a sibset, considering that they ARE both from Star Trek (though from different series). Jadzia is pretty blatantly from ST - she was one of the main characters of Deep Space Nine. Miral is less obviously so; she was the daughter of Tom and B'Elanna, and her name was only mentioned in the last episode of Voyager (at least, to my knowledge).
I really like Jadzia, especially with the nn Jazz. Miral is nice too, but I'd probably put it in the middle name slot, if I used it at all. I've used Jadzia Miral nn Jazz on a character before, but I probably wouldn't put both together on a real kid.
What about combos? Any combo suggestions, using either Jadzia or Miral as either a first or middle name?
-------
'06-'07 jazz sax section leader
'06-'07 flute section leader
'06-'07 lead pan section leader