| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| IDAHOE MISS CANDY | Mare | GREY | 35150 | 12/07/1973 | Stud Book | Deceased |
| IDAMAR GOLDIE | Mare | CHESTNUT | 18156 | 01/08/1961 | Stud Book | Deceased |
| IDAMAR MAGIC MISCHIEF | Mare | BAY | 10564 | 03/10/1975 | Stud Book | Deceased |
| IDAWAY ALL EYEZA ON ME | Gelding | CHESTNUT | C1-236349 | 03/10/2013 | First Cross | Eligible |
| IDAWAY KOOL ELLIE | Mare | BAY | C1-236350 | 06/10/2013 | First Cross | Eligible |
| IDAWAY SNEAK PREVIEW | Gelding | BAY | C1-236351 | 30/09/2013 | First Cross | Not Eligible |
| IDDALAC | Gelding | CHESTNUT | F40366 | 26/10/1985 | Foal Recorded | Deceased |
| IDDY BIDDY CHEX | Mare | CHESTNUT | C1-164043 | 19/11/1997 | First Cross | Not Eligible |
| IDEAL - HSH | Gelding | BROWN/BLACK | 190485 | 31/01/2008 | Stud Book | Not Eligible |
| IDEAL ROMAN JEWEL | Mare | BAY | 261735 | 10/01/2023 | Stud Book | Eligible |
| IDEAL STUD CALAM DESTINY | Stallion | BAY | 260959 | 12/10/2022 | Stud Book | Eligible |
| IDEAL STUD CLOONY | Gelding | CHESTNUT | C2-192935 | 03/09/2010 | Second Cross | Not Eligible |
| IDEAL STUD DEANNE | Mare | CHESTNUT | 199774 | 24/08/2012 | Stud Book | Eligible |
| IDEAL STUD DENIRO | Gelding | CHESTNUT | 193651 | 17/09/2009 | Stud Book | Deceased |
| IDEAL STUD DUN IN STYLE | Gelding | BAY/ROAN | C1-266103 | 09/12/2022 | First Cross | Eligible |
| IDEAL STUD JOCOM | Gelding | CHESTNUT | C1-193182 | 15/11/2007 | First Cross | Deceased |
| IDEAL STUD JOHNNY CASH | Stallion | CHESTNUT | C2-260960 | 15/11/2022 | Second Cross | Eligible |
| IDEAL STUD LOIS LANE - HSH | Mare | BROWN | 260766 | 04/10/2015 | Stud Book | Eligible |
| IDEAL STUD SEPRANO | Mare | BAY | 192842 | 20/10/2009 | Stud Book | Not Eligible |
| IDEAL STUD SILVER BOUNTY | Gelding | BROWN/GREY | C1-261444 | 04/10/2021 | First Cross | Eligible |
| IDEAL STUD SUMMER | Mare | BROWN | C2-193057 | 08/10/2010 | Second Cross | Not Eligible |
| IDEAL STUD VENUS | Mare | BROWN | 194638 | 15/11/2010 | Stud Book | Not Eligible |
| IDEAL TARGET | Mare | CHESTNUT | F25647 | 15/09/1980 | Foal Recorded | Deceased |
| IDEALE | Gelding | CHESTNUT | 58660 | 04/12/1976 | Stud Book | Not Eligible |
| IDEALSTUD CHEROKEE CHIC - HSH | Mare | BAY | 264510 | 15/10/2023 | Stud Book | Deceased |
| IDEALSTUD CRIMSON ROSE | Mare | BAY | 264511 | 25/09/2023 | Stud Book | Eligible |
| IDEALSTUD LIBERTY MOON - HSH | Stallion | BLACK | 264508 | 20/08/2023 | Stud Book | Eligible |
| IDEALSTUD ROMAN COIN | Stallion | BAY | 264509 | 21/08/2023 | Stud Book | Eligible |
| IDENTICAL | Gelding | BROWN | 241373 | 11/09/2015 | Stud Book | Not Eligible |
| IDENTITY CRISIS | Gelding | CHESTNUT | 187231 | 17/11/2007 | Stud Book | Not Eligible |
| IDENTITY UNKNOWN | Gelding | BROWN | C2-263206 | 25/10/2020 | Second Cross | Not Eligible |
| IDERWAY | Gelding | BLACK | 18253 | Stud Book | Deceased | |
| IDLANIR FLICKA | Mare | GREY | 34410 | Stud Book | Not Eligible | |
| IDLANIR GYRO | Gelding | GREY | 49355 | 27/10/1968 | Stud Book | Deceased |
| IDLE DECK | Mare | BAY | 63533 | 20/09/1977 | Stud Book | Deceased |
| IDLE DREAMS | Mare | GREY | 27012 | Stud Book | Not Eligible | |
| IDLE MIDGE | Mare | CHESTNUT | 8540 | 21/08/1970 | Stud Book | Deceased |
| IDLE RED | Gelding | BROWN | 55824 | 09/12/1977 | Stud Book | Deceased |
| IDLE REFLECTIONS | Mare | BAY | 56190 | 28/11/1974 | Stud Book | Not Eligible |
| IDLE TALK | Mare | CHESTNUT | 19148 | Stud Book | Deceased | |
| IDLE TALK LITTLE LIKE SPIN | Stallion | BROWN | C1-163300 | 03/12/1998 | First Cross | Not Eligible |
| IDLE VERSE | Mare | CHESTNUT | 58608 | 24/12/1971 | Stud Book | Deceased |
| IDLE WANDERER | Gelding | BAY | 53204 | 01/11/1973 | Stud Book | Not Eligible |
| IDLEWILD TATOO | Stallion | CHESTNUT | 43041 | 26/09/1974 | Stud Book | Not Eligible |
| IDLEWILD VENUS | Mare | CHESTNUT | 23946 | 01/09/1969 | Stud Book | Deceased |
| IDLEWYLE DENS FRIEND | Gelding | BROWN | 18693 | 11/11/1960 | Stud Book | Deceased |
| IDODOWN | Gelding | CHESTNUT | C2-235394 | 20/09/2012 | Second Cross | Not Eligible |
| IDOL | Mare | BROWN | 28885 | Stud Book | Not Eligible | |
| IDOL OAK | Mare | DUN | 153328 | 28/11/1998 | Stud Book | Not Eligible |
| IDOL RAC | Mare | CHESTNUT | 76098 | 04/10/1980 | Stud Book | Not Eligible |
| IDOL THREAT | Gelding | BROWN | 66302 | 01/01/1975 | Stud Book | Not Eligible |
| IDOLINE | Mare | CHESTNUT/ROAN | F35776 | 20/09/1982 | Foal Recorded | Not Eligible |
| IDOLS BOY SKEETA | Gelding | BROWN | 70588 | 01/08/1978 | Stud Book | Not Eligible |
| IDOLWAY COLLEEN | Mare | BROWN | 220580 | 12/12/1987 | Stud Book | Not Eligible |
| IDOLWAY COPPER PENNY | Gelding | CHESTNUT | 61879 | 01/01/1978 | Stud Book | Deceased |
| IDOLWAY MOLLIE MAGGEE | Mare | BROWN | 70016 | 01/09/1982 | Stud Book | Not Eligible |
| IDOLWOOD HOOLIGAN | Gelding | CHESTNUT | 265661 | 25/11/2011 | Stud Book | Not Eligible |
| IDOWRA APACHE | Stallion | BAY | 133156 | 17/09/1996 | Stud Book | Not Eligible |
| IDOWRA BEACON | Gelding | BUCKSKIN | C2-252879 | 10/12/2018 | Second Cross | Not Eligible |
| IDOWRA BEAUTY - HSH | Mare | BLACK | 157828 | 06/10/1990 | Stud Book | Deceased |
| IDOWRA BROWN SUGAR | Mare | DUN | 120011 | 18/08/1992 | Stud Book | Not Eligible |
| IDOWRA COMMANCHIE | Gelding | DUN | 133157 | 03/12/1996 | Stud Book | Not Eligible |
| IDOWRA DIANNA | Mare | GREY | C2-241310 | 12/10/2013 | Second Cross | Not Eligible |
| IDOWRA EBONY | Mare | BLACK | 150616 | 23/10/1998 | Stud Book | Deceased |
| IDOWRA ELLA - HSH | Mare | CHESTNUT | F34745 | 27/12/1982 | Foal Recorded | Not Eligible |
| IDOWRA ELSA - HSH | Mare | BAY | 105299 | 20/11/1984 | Stud Book | Deceased |
| IDOWRA EMBER - HSH | Stallion | BAY/BROWN | F30718 | 21/09/1981 | Foal Recorded | Not Eligible |
| IDOWRA FERN | Mare | BROWN | C2-252880 | 29/12/2016 | Second Cross | Eligible |
| IDOWRA FOLLY - HSH | Mare | BAY | 105589 | 27/08/1986 | Stud Book | Not Eligible |
| IDOWRA GEM | Mare | CREMELLO | 259536 | 10/12/2019 | Stud Book | Eligible |
| IDOWRA GEMMA - HSH | Mare | CHESTNUT | 119026 | 21/12/1991 | Stud Book | Deceased |
| IDOWRA GUCCI - HSH | Gelding | BAY | 195942 | 12/12/2009 | Stud Book | Not Eligible |
| IDOWRA HALLE - HSH | Mare | BLACK | 154671 | 07/12/2003 | Stud Book | Eligible |
| IDOWRA IMPRINT | Stallion | GREY | 134622 | 15/10/1997 | Stud Book | Not Eligible |
| IDOWRA JEWEL - HSH | Mare | BAY | 159854 | 18/10/2002 | Stud Book | Not Eligible |
| IDOWRA MARTINA | Mare | CHESTNUT | C2-242502 | 20/09/2012 | Second Cross | Not Eligible |
| IDOWRA MAY | Mare | BUCKSKIN | C1-268557 | 26/09/2021 | First Cross | Eligible |
| IDOWRA MERRY | Mare | BAY | C1-252881 | 23/11/2017 | First Cross | Not Eligible |
| IDOWRA MISTY | Mare | BAY | 66510 | 01/01/1977 | Stud Book | Not Eligible |
| IDOWRA PAIGE | Mare | BROWN | SM-147642 | 21/10/1997 | Special Merit - Stud Book | Not Eligible |
| IDOWRA RAINMAKER | Gelding | BROWN | C2-238405 | 03/10/2014 | Second Cross | Not Eligible |
| IDOWRA RAYMIST - HSH | Stallion | BROWN/BLACK | F34744 | 18/11/1982 | Foal Recorded | Not Eligible |
| IDOWRA REVISE - HSH | Gelding | BAY | 234547 | 24/10/2011 | Stud Book | Not Eligible |
| IDOWRA ROSE | Mare | BAY | 144592 | 16/11/1999 | Stud Book | Eligible |
| IDOWRA SALLY | Mare | BROWN | 58678 | 07/11/1973 | Stud Book | Not Eligible |
| IDOWRA STAR | Gelding | BAY | C2-255247 | 01/11/2019 | Second Cross | Eligible |
| IDOWRA STYLISTIC | Stallion | BAY | F34743 | 10/12/1982 | Foal Recorded | Not Eligible |
| IDOWRA SWAGMAN | Stallion | CHESTNUT | 127731 | 10/12/1994 | Stud Book | Deceased |
| IDOWRA TOFFEE - HSH | Mare | BAY | 179544 | 12/12/2006 | Stud Book | Eligible |
| IDOWRA VENUS | Mare | BLACK | C2-242503 | 27/08/2010 | Second Cross | Eligible |
| IDOWRAS ELLY - HSH | Mare | CHESTNUT | F37041 | 09/12/1983 | Foal Recorded | Not Eligible |
| IDS MISS ELLE | Mare | BROWN/BLACK | 252948 | 04/12/2014 | Stud Book | Eligible |
| IDYLL BRIGHT | Mare | CHESTNUT | 63037 | 26/09/1979 | Stud Book | Not Eligible |
| IDYLL FLINTLOCK | Stallion | CHESTNUT | 4309 | 01/01/1966 | Stud Book | Deceased |
| IDYLL MISTRAL | Mare | GREY | 4310 | Stud Book | Deceased | |
| IDYLL SIANE | Mare | GREY | 68049 | 23/10/1975 | Stud Book | Not Eligible |
| IDYLL STARIUS | Mare | BAY | 4311 | Stud Book | Deceased | |
| IESH | Mare | BROWN/BLACK | 64679 | 20/11/1980 | Stud Book | Not Eligible |
| IEVERS STAR WILLOW - HSH | Mare | BROWN | 151239 | 05/02/2004 | Stud Book | Eligible |
| IFALIGHT | Mare | CHESTNUT | BP-78421 | 07/10/1980 | Breeding Purposes Only - Stud Book | Deceased |