Milla is one of the feminine names — central to traditional Hebrew + Slavic heritage. 860-921 CE — patron saint of Czech Republic). feminine name reflecting Hebrew + multi-cultural heritage.
Milla 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 Milla reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.