Milana is from the Slavic Milana — feminine of Milan — from the Slavic root mil (gracious, dear, lovely). Milana is one of the Slavic feminine names — among the fastest-rising American girls' names of the 2020s.
Milana 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 Milana reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.