Katie is the English diminutive of Katherine — from the Greek katharos (pure). A top-100 US baby name from 1979 to 2010. Katie Ledecky (born 1997) — American swimmer; seven Olympic gold medals across three Olympic Games (2012, 2016, 2020, 2024); nine total Olympic medals — the most decorated female swimmer in Olympic history. 21 World Championship gold medals — the most ever in women's swimming. Set the world record in the women's 1500m freestyle 13 times since 2013; holds the longest current world record in women's swimming (1500m free 2018). Stanford grad in psychology (2021). Katie Couric (born 1957) — first solo female anchor of a US weeknight network news broadcast (CBS Evening News, 2006-2011). Katie Holmes (Dawson's Creek), Katie Porter (US Congresswoman).
Subject of countless swimming retrospectives.
In Pythagorean numerology the letters of Katie reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.