Klavdia (Клавдия) is the Russian form of Claudia — from the Latin claudus, meaning "lame." Used widely in Russia and Ukraine.
Klavdiya Shulzhenko (1906-1984) was the famous Soviet singer.
Klavdia 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 Klavdia reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.