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When it comes to girls (and in Colin's case, it so often did), everyone has a type. Colin Singleton's type was not physical but linguistic: he liked Katherines. And not Katies or Kats or Kitties or Cathys or Rynns or Trinas or Kays or Kates or, god forbid, Catherines. K-A-T-H-E-R-I-N-E. He had dated 19 girls. All of them had been named Katherine. And all of them- every single solitary one- had dumped him.

John Green (2008). “An Abundance of Katherines”, p.23, Penguin
When it comes to girls (and in Colin's case, it so often did), everyone has a type. Colin Singleton's type was not physical but linguistic: he liked Katherines. And not Katies or Kats or Kitties or Cathys or Rynns or