Some nicknames have become so prevalent, they stop being nicknames and become the person’s all-the-time name. With Katie, many American parents have thought, Why name the baby Katherine or Kathleen if we intend to call her Katie? It’s a sweet, friendly name that's easy to pronounce and remember. The entertainment and media worlds seems to attract a fair number of Katies: Holmes, Couric, and Cassidy. Then there’s singer Katy Perry, who’s always doing things a little differently; born Katheryn, she opted out of “–ie” for the more unusual “–y” ending.

Popularity Trend Chart

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Source: Social Security Administration

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