Kerry is from the Irish County Kerry (Ciarraí, "the people of Ciar") — from ciar, "dark, black." A top-100 US baby name from 1968 to 1974, peaking at #74 in 1969. Kerry Russell — actually Keri Russell (different spelling). Kerry Madsen — Australian sprintcar racer. Kerry-Anne Kennerley — Australian TV host. Kerry Strug (born 1977) — American gymnast; her iconic one-footed vault landing on an injured ankle at the 1996 Atlanta Olympics secured Team USA's first Olympic team gold in women's gymnastics; she was carried to the podium by coach Béla Károlyi. The moment is one of the most-watched Olympic memories of the 1990s.
Kerry 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 Kerry reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.