Ewa is the Polish form of Eve — from the Hebrew Ḥawwāh (life, living one). Ewa Plonka — Polish operatic soprano. Ewa Wachowicz — Polish TV host. Ewa Jakubowska — modern Polish figure. Ewa Strzelecka — Polish heroine.
Ewa 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 Ewa reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.