イレーヌ・ジョリオ＝キュリー
Other element names have been proposed but failed to gain official international recognition. These include columbium (Cb), hahnium (Ha), joliotium (Jl), and kurchatovium (Ku), names connected to Christopher Columbus, Otto Hahn, Irène Joliot-Curie, and Igor Kurchatov; and also cassiopeium (Cp), a name coming from the constellation Cassiopeia and is hence indirectly connected to the mythological Cassiopeia. (See the article on element naming controversies and List of places used in the names of chemical elements.)