Jonjo O'Neill (jockey)

John Joseph "Jonjo" O'Neill is an Irish National Hunt racehorse trainer and former jockey. He is a native of Castletownroche, County Cork in Ireland. Based at the Jackdaws Castle training establishment in England. O'Neill twice won the British Champion Jockey title and won the Cheltenham Gold Cup on the mare, Dawn Run who became the only horse to complete the double of winning the Champion Hurdle and the Gold Cup at the Cheltenham Festival. He won 900 races as a jockey. ^{Jonjo O'Neill, Irish jockey and trainer}

13 April 1952

Born on the same birth date (13 April 1952): Gabrielle Gourdeau

Born on the same birth day (13 April): Alexander Mitchell (engineer) • David Robinson (philanthropist) • James Ensor • John Braine • John Spencer-Churchill, 11th Duke of Marlborough • John-Allison Weiss • Josh Reynolds (rugby league) • Leopold Fitzinger • Max Mosley

Born in the same month (April 1952): Cherie Lunghi • Dennis Mortimer • George Gervin • Gerald Early • Gilles Valiquette • Gregg Hansford • John McColl (British Army officer) • Kenny Aaronson • Mary McDonnell • Masashi Sada • Narada Michael Walden • Nora Dunn • Ralph Wiley • Sandy Mayer