Please choose a Sith name for Luke Skywalker.
Phoebus (meaning 'star' or 'sun')
Starkiller (old name for the Skywalker family)
Vermis or Wyrm (both mean 'worm[ie])
Thanks to everyone, especially knight_ander, laarii, reihla and bobill for the suggestions.
Feel free to back up your vote with some words of advice... and caution! :p