The spelling of the name has changed as the language has developed: Ellofanum (720), Illechilechen (826), Illenkirche (845), Illekiriche (920), Illachirecha (1163) and Illenkirchen (1172) which mutated into the contemporary name, Illkirch.
Septembra 2008 je svoj delež prodal za 185 milijonov evrov.