Riham (رهام) is the Arabic word for "continuous gentle drizzling rain" — particularly evocative in desert cultures where rain is precious.
Riham is widely used in the Arab world.
Riham 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 Riham reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.