, , , , , , , , , , , , , , , , , , galopp-sieger.de – Duchess of Cambridge Stakes. ifhaonline.org – International Federation of Horseracing Authorities – Duchess of Cambridge Stakes (2019). pedigreequery.com – Duchess of Cambridge Stakes – Newmarket. Flat races in Great Britain Newmarket Racecourse Flat horse races for two-year-old fillies Recurring sporting events established in 1947 1947 establishments in England