This simple yet evocative French word name was chosen for her daughter by model NikiTaylor. While Ciel may be pronounced in French with two syllables, many will pronounce it as "seal" and there may be confusion with Celia and sister Ceil.
The (male) protagonist of the manga/anime BlackButler/Kuroshitsuji is named Ciel Phantomhive.
Female character in the manga/anime Tsukihime
Name of a female character in the Mega ManZero games
Ciel haircare/body products and spas
Ciel, a bottled water company owned by Coca-Cola in Latin America