Kate is the English short form of Katherine — from the Greek katharos (pure). Catherine "Kate" Middleton (born 1982) — the Princess of Wales since her husband William's accession to the title in 2022; her 2011 wedding was watched by an estimated 2 billion people worldwide and is widely considered the most-watched royal event in history.
Subject of countless royal biographies.
Kate does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Kate reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.