Namesakes
Olympic Medalists:
1 gold
(gold) Gaston Reiff (a.k.a. Ghislaine) 1948 5000 m 
Other Royalty:
1 princess, 1 queen consort
Mathilde of Belgium (a.k.a. Ghislaine) 2013- Belgium
Delphine of Belgium (a.k.a. Ghislaine) 2020- Belgium