Saruul is from the Mongolian саруул (saruul — radiant, bright, luminous). Saruul Tsednee — modern Mongolian Olympic figure (judo). Saruul Gantsooj — Mongolian-American academic. Saruulbuyan Damdin — Mongolian artist. Saruul Erdene — modern Mongolian-American figure. Princess Saruul — modern Mongolian royal heritage naming. The Mongolian-American population (over 25,000 in the US) has worked to preserve Mongolian heritage names through cultural centers and language schools across major metropolitan areas including the Mongolian American Cultural Center in Arlington, Virginia.
Saruul 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.
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In Pythagorean numerology the letters of Saruul reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.