Kristi is a 20th-century American diminutive of Kristina / Christine — from the Greek christianos (follower of Christ). Two-time World Champion (1991, 1992); five-time US Champion. Married NHL player Bret Hedican in 2000. Kristi McNichol (born 1962) — American actress.
Subject of countless Olympic figure-skating retrospectives.
Kristi 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 Kristi reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.