- Jackson, Forbes 1
- Jacobus 1, 2
- James I, King 1
- Jameson 1, 2, 3
- Jardy 1
- Jarvis, Jack 1, 2, 3
- Jeddah 1, 2
- Jelliss, Henri 1
- Jenkinstown 1
- Jennings, Tom 1
- Jerome, Jennie 1
- Jerry M 1
- Jest 1, 2, 3
- Jockey Club 1, 2, 3, 4, 5, 6, 7
- Jockey Club Cup 1, 2
- Jockey Club Stakes 1
- Joel, J. B. 1, 2, 3
- Johnson, Edward 1
- Johnson, Noble 1, 2, 3, 4
- works with Eustace Loder 1
- and purchase of Eyrefield Lodge 1, 2
- sickness at Old Connell stud farm 1, 2, 3, 4
- and reaction to Craganour’s disqualification 1, 2, 3
- Jones, Herbert 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
- Jones, John 1
- Jones, Thelma 1
- July Stakes 1