Leonore2014 Born Thu, 20 February 2014 Weill Cornell Medical Center , New York Details Parents Princess, Duchess of Gotland Leonore Lilian Maria Bernadotte Age: 10 years, 10 months, 3 days father Christopher O'Neill 1974 mother Madeleine of Sweden 1982 Siblings Brother Nicolas 2015 Sister Adrienne of Sweden 2018