Janet is a medieval Scottish diminutive of Jane — itself the feminine of John, from the Hebrew Yochanan ("God is gracious"). A top-30 US baby name from 1932 to 1962, peaking at #19 in 1937, 1942, and 1953. Janet Yellen (born 1946) — first woman to serve as Chair of the Federal Reserve (2014-2018) and as US Secretary of the Treasury (2021-2025) — the only person ever to have held all three top US economic posts. Janet Jackson (born 1966) — American pop singer; 10 #1 Billboard Hot 100 singles. Janet Reno (1938-2016) — first female US Attorney General.
Subject of Janet Jackson's documentary Janet (2022).
In Pythagorean numerology the letters of Janet reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.