Ceres is from the Latin Cerēs — Roman goddess of agriculture, grain, and fertility — root of the English cereal. Appears in Ovid's Metamorphoses, Fasti, and Virgil's Georgics. The dwarf planet Ceres is the largest object in the asteroid belt and closest dwarf planet to the Sun — discovered by Giuseppe Piazzi (January 1, 1801) and named in her honor, studied by the NASA Dawn mission (2015-2018).
Ceres 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 Ceres reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.