Elzbieta is from the Polish Elżbieta — Polish rendition of Elizabeth — from the Hebrew Elīšeḇaʿ (God is my oath). Elzbieta is one of the Polish feminine names — central to Polish royal + Catholic heritage.
Elzbieta 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 Elzbieta reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.