The name Karlee means:

  C - COVERABLE
  O - OVERWEIGHT
  L - LATITUDINAL
  L - LIGNIVOROUS
  E - EVADABLE
  E - EVAPORABLE
  N - NONBIOLOGICAL

Colleen means:
Girl

  B - BINOMIAL THEOREM
  I - INVERSE SINE
  L - LEAST COMMON DENOMINATOR
  L - LEADING COEFFICIENT

BILL means:
Resolute protector

  T - TRANQUIL
  O - ONE
  N - NOW
  Y - YES

TONY means:
highly praiseworthy. Abbreviation of Anthony and its variants used since medieval times as an independent name.