Namesakes

Olympic Medalists: 1 bronze
(bronze) Heidi Robbiani (a.k.a. Adelheid)   1984   equestrian  
Other Royalty: 1 grand duke
Marie-Adélaïde, Grand Duchess of Luxembourg (a.k.a. Adelheid)   1912-1919   Luxembourg  
Saints: 1 saint
Saint Adelaide (a.k.a. Adelheid)   960-1015