You can search those royal history books and family trees as much as you like, you won't find another princess called Estelle anywhere. It's possible that her parents, Crown Princess Victoria and Prince Daniel of Sweden, named their first born after New York born Estelle Manville who married a distant royal cousin, Folke Bernadotte, and was known for her humanitarian work. This future queen's name is a royal rarity you won't find in any recent top 100 baby names countdown although related name, Stella, hit the top 60 last year.