The name pen means:

  R - RIGHT ASCENSION
  O - OBSERVATORY
  O - OPPOSITION
  K - KUIPER BELT

ROOK means:
Raven

  A - ACCEPTED
  L - LUCKY
  E - EXQUISITE
  X -
  Y - YUMMY
  S - SKILLFUL

Alexys means:
Variant of Alexus Alexx Alexxa Alexandra Alexxis Alexis Alexya Alexyea Alexyia Alexys Alexyss: Protector of mankind

  B - BRUSH
  E - ERASER
  N - NONOBJECTIVE ART
  J -
  Y -

BENJY means:
Blessed