Coyolxauhqui is from the Nahuatl coyolli (bells) + xāuh (to paint) — She with bells on her cheeks. Coyolxauhqui is the Aztec moon goddess and daughter of Coatlicue (the earth mother). In the Aztec creation myth, Coyolxauhqui led her 400 brothers (the Centzon Huitznahua, the stars) to kill their mother — but Huitzilopochtli (the sun god) was born fully armed and beheaded Coyolxauhqui, throwing her body down the sacred mountain. The iconic Coyolxauhqui Stone — a 3.4-meter-diameter circular relief discovered in 1978 at the base of the Templo Mayor in Mexico City — depicts her dismembered body and is one of the masterpieces of Aztec art. Now displayed at the Museo del Templo Mayor.
Coyolxauhqui 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 Coyolxauhqui reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.