Saint Wihtburga (d. c. 743) was the youngest sister of Saint Etheldreda of Ely — daughter of King Anna of East Anglia.
Translated to Ely Cathedral.
Wihtburga is a compound name. Its parts are burg — each an attested element with a recorded meaning of its own.
Wihtburga 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 Wihtburga reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.