Complex sentence: Kit is an affectionate abbreviation of the given names Christopher (or Kristofer/Krystifa) and Catherine (or Katherine/Kathryn), although its use as a given name in its own right is becoming increasingly common.
Split into simpler sentences: Kit is an affectionate abbreviation of the given names Christopher, Kristofer, Krystifa, Catherine, Katherine, or Kathryn. Its use as a given name in its own right is becoming increasingly common.