Metztli is the Aztec lunar goddess — also the Nahuatl word for "moon" and "month." In Aztec mythology, Metztli (also called Coyolxauhqui in some traditions) governed the night sky.
Metztli is rising in Mexico as part of the Indigenous-revival naming movement.
Metztli 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 Metztli reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.