| Jack | ♂ | 2015 | FI | – | ER28745/19 | ♂ Bamba Toohey | ♀ Kataran Cass |
| Jack Sparrow Rebell Represent | ♂ | 2023 | CZ | Rebell Represent (Kristýna Nozarová Přibylová) | CMKU/AKE/853/23 | ♂ Empathic Commander Rebell Represent | ♀ Arrogant Grey Di Casa Hesselink |
| Jaenela Kelpiebrink | ♀ | 2021 | NL | – | NHSB3224893 | – | ♀ Femke Caobrink |
| Jaimie Xapatan | ♀ | 2014 | CZ | – | CMKU/AKE/282/14 | – | ♀ Foxy Xapatán |
| Jakari Dai Muratori | ♀ | 2023 | CZ | – | CMKU/AKE/819/23 | – | ♀ Hasty´s Hope Dai Muratori |
| Jango Xapatan | ♂ | 2014 | CZ | – | CMKU/AKE/279/14 | – | ♀ Foxy Xapatán |
| Jarrah Baralga Warrigal | ♂ | 2013 | NL | – | NHSB2937860 | ♂ Mountainmist The Fugitive | ♀ Numbat Merinda Warrigal |
| Jata Black Mount Mckinkey | ♀ | 2017 | CZ | Marcela Nováková | ČMKU/AKE/448/17 | ♂ Apple Brown Rebell Represent | ♀ Fatal Black Mount Mckinkey |
| Javelin ATGM Rebell Represent | ♀ | 2023 | CZ | Rebell Represent (Kristýna Nozarová Přibylová) | CMKU/AKE/857/23 | ♂ Empathic Commander Rebell Represent | ♀ Arrogant Grey Di Casa Hesselink |
| Jekku Rebell Represent | ♂ | 2023 | CZ | Rebell Represent (Kristýna Nozarová Přibylová) | CMKU/AKE/854/23 | ♂ Empathic Commander Rebell Represent | ♀ Arrogant Grey Di Casa Hesselink |
| Jekyll Rebell Represent | ♂ | 2023 | CZ | Rebell Represent (Kristýna Nozarová Přibylová) | CMKU/AKE/855/23 | ♂ Empathic Commander Rebell Represent | ♀ Arrogant Grey Di Casa Hesselink |
| Jessie Brown Mount Mckinkey | ♀ | 2017 | CZ | – | CMKU/AKE/449/17 | ♂ Apple Brown Rebell Represent | ♀ Fatal Black Mount Mckinkey |
| Jessie Dai Muratori | ♀ | 2023 | CZ | – | CMKU/AKE/820/23 | – | ♀ Hasty´s Hope Dai Muratori |
| Jessie Xapatan | ♀ | 2014 | CZ | – | CMKU/AKE/277/14 | – | ♀ Foxy Xapatán |
| Jet Kelpiebrink | ♀ | 2019 | NL | – | NHSB3153187 | – | ♀ Morrigan Kelpiebrink |
| Jewel Dai Muratori | ♀ | 2023 | CZ | – | CMKU/AKE/821/23 | – | ♀ Hasty´s Hope Dai Muratori |
| Jimboomba Break The Silence Marshmello | ♂ | 2026 | NL | – | NHSB3379728 | – | ♀ Jimboomba Whoopee Dreams Come True |
| Jimboomba Djalu | ♀ | 2026 | NL | – | NHSB3379733 | – | ♀ Jimboomba Whoopee Dreams Come True |
| Jimboomba Karmeliet Brewed With Patience | ♀ | 2026 | NL | – | NHSB3379732 | – | ♀ Jimboomba Whoopee Dreams Come True |
| Jimboomba Lightning Salto | ♀ | 2026 | NL | – | NHSB3379731 | – | ♀ Jimboomba Whoopee Dreams Come True |