Salwa (سلوى) is the Arabic word for "consolation" or "solace." The word appears in the Quran referring to the quail and manna God sent to the Israelites in the wilderness.
Salwa is widely used across the Arab world.
Salwa 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 Salwa reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.