I've already called my DD (4 months) Katherine. I wanted to give her a name that she could DO something with, IYSWIM. You may be able to guess my name from my "NN". I've never appreciated it's one-syllable plainness! My reasoning for going with the K rather than the C is this: many Katherines become Katie or Kate and I don't really "get" how Catherine becomes Kate, in the manner of Catherine Middleton. I mean I know William leads to Billy, but... After telling people our name choice we received loads of nice "new baby" cards written to "Catherine". No biggie, but have I given the girl a tedious, lifelong problem? Also, if you look at the two different spellings, do they create different impressions in your mind?