Kit is a diminutive of Christopher/Katherine — from the Greek Christos (anointed) or katharos (pure). Kit Harington (born 1986) — male; English actor; played Jon Snow on HBO's Game of Thrones (2011-2019); the series won 59 Primetime Emmy Awards — the most in TV history; Harington earned two Primetime Emmy nominations for Outstanding Supporting Actor in a Drama Series; the finale was watched live by 19.3 million US viewers — the largest US TV finale audience of the 2010s; married co-star Rose Leslie (Ygritte) in 2018. Kit Carson (1809-1868) — male; American frontiersman. Kit Pongetti — Wicked original cast.
Kit 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 Kit reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.