Hürrem is from the Persian khurram (joyful, cheerful) — adopted into Ottoman Turkish. Hürrem Sultan (Roxelana, c. Princess Hürrem — modern Turkish royal naming.
Hürrem 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 Hürrem reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.