Sky or heaven
Derived directly from the French word for 'sky' and, by extension, 'heaven'. It carries a celestial and airy quality, often associated with the divine or the vast expanse of the atmosphere. While historically rare in English-speaking countries, it has gained some visibility through international pop culture.
About 28 girls were named Ciel in 2025.
Main protagonist and head of the Phantomhive house · Black Butler
A human scientist and leader of the Resistance · Mega Man Zero
US births per 5-year period, 1990–present (SSA data).
