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Adelaide comes from the Old High German name Adalheidis, composed of the elements adal, meaning noble, and heid, meaning kind, sort, or type, giving an overall sense of noble nature or of noble kind. The name was borne by Saint Adelaide of Italy, a tenth-century empress and widow of Holy Roman Emperor Otto I, whose veneration helped spread the name across medieval Europe. It remained popular among European royalty and aristocracy for centuries, notably carried by Adelaide of Saxe-Meiningen, queen consort of King William IV of Britain, after whom the Australian city of Adelaide was named in 1836. Closely related forms include Adèle, Adélie, Heidi, and the Latinate Adelaida.