| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| INVITATION | Mare | BROWN | 66067 | 16/02/1977 | Stud Book | Deceased |
| INXS | Gelding | BAY | C1-229298 | 14/09/2008 | First Cross | Eligible |
| INYALA | Mare | CHESTNUT | 1495 | Stud Book | Deceased | |
| IONA | Mare | CHESTNUT | 554 | Stud Book | Deceased | |
| IONA BRUCE | Mare | CHESTNUT | 11708 | 01/01/1968 | Stud Book | Deceased |
| IONA CHARMIANNE | Mare | BAY | 7152 | 26/12/1970 | Stud Book | Deceased |
| IONA DOLLAR | Gelding | CHESTNUT | 11911 | 15/10/1970 | Stud Book | Deceased |
| IONA FLICKA | Mare | CHESTNUT | 7153 | 01/01/1970 | Stud Book | Deceased |
| IONA GIDGET | Mare | BROWN | 11913 | 11/10/1970 | Stud Book | Deceased |
| IONA JACQUELINE | Mare | CHESTNUT | 12442 | Stud Book | Deceased | |
| IONA LADY | Mare | GREY | 17894 | Stud Book | Deceased | |
| IONA LADY BRUCE | Mare | BLACK | 7151 | 12/12/1967 | Stud Book | Deceased |
| IONA LITTLE DOLL | Mare | BAY | 11914 | 21/09/1971 | Stud Book | Deceased |
| IONA MERMAID | Mare | GREY | 11912 | 01/01/1967 | Stud Book | Deceased |
| IONA RIVOLI DIVA | Mare | BAY | 241704 | 11/12/2015 | Stud Book | Eligible |
| IONA RIVOLI SURPRISE | Mare | BROWN/BLACK | 247658 | 25/09/2017 | Stud Book | Eligible |
| IONA RIVOLI SWANKY - HSH | Mare | BAY | 180405 | 20/12/2005 | Stud Book | Eligible |
| IONA SHERRY | Mare | BAY | 13576 | 01/08/1971 | Stud Book | Deceased |
| IONA VALE BLAZE | Mare | CHESTNUT | 138871 | 01/11/1988 | Stud Book | Not Eligible |
| IONA VALE GLENDA | Mare | BROWN | 4835 | 01/08/1968 | Stud Book | Deceased |
| IOVIAL KERRY ANN | Mare | BROWN | 6670 | Stud Book | Deceased | |
| IOWA | Gelding | CHESTNUT | 22473 | 01/01/1970 | Stud Book | Deceased |
| IOWNA STAR | Mare | BROWN | 70167 | 29/10/1981 | Stud Book | Not Eligible |
| IPLEY ANNA | Mare | GREY | 37745 | 12/11/1974 | Stud Book | Not Eligible |
| IPLEY HARMONY | Mare | CHESTNUT | 67259 | 21/09/1977 | Stud Book | Not Eligible |
| IPLEY POLLYANNA | Mare | PALOMINO | 73241 | 01/10/1982 | Stud Book | Not Eligible |
| IRA | Gelding | CHESTNUT | 12030 | 01/01/1970 | Stud Book | Deceased |
| IRA BE - HSH | Mare | BROWN | 57356 | 10/02/1978 | Stud Book | Deceased |
| IRAGANA JEZZA | Gelding | BROWN | 45173 | 01/01/1971 | Stud Book | Deceased |
| IRAGANA KANE | Stallion | CHESTNUT | F20917 | 30/10/1979 | Foal Recorded | Not Eligible |
| IRAGANA KIZZY | Mare | BROWN | 45172 | 30/09/1974 | Stud Book | Not Eligible |
| IRAGANA NATASHA | Mare | BAY | F20266 | 17/10/1979 | Foal Recorded | Not Eligible |
| IRAKI AMAAL | Stallion | CHESTNUT | 52672 | 07/09/1974 | Stud Book | Not Eligible |
| IRAMOO BAY LEAF | Mare | BAY | F44550 | 28/10/1988 | Foal Recorded | Not Eligible |
| IRAMOO KRYPTON | Gelding | BAY/GREY | 112706 | 18/10/1990 | Stud Book | Not Eligible |
| IRANELLA | Mare | BAY | 58441 | Stud Book | Not Eligible | |
| IRELANDS SHALE | Gelding | GREY | 48196 | 10/10/1972 | Stud Book | Eligible |
| IRENE | Mare | BAY | 606 | Stud Book | Deceased | |
| IRENE BABE - HSH | Mare | BROWN | 9519 | 01/08/1966 | Stud Book | Deceased |
| IRENEY GIRL | Mare | DUN | 55834 | 01/01/1974 | Stud Book | Not Eligible |
| IRIA | Mare | PALOMINO | 23038 | Stud Book | Deceased | |
| IRIS - HSH | Mare | GREY | 4575 | 01/08/1964 | Stud Book | Deceased |
| IRISH - HSH | Mare | BLACK/GREY | 151714 | 29/09/2000 | Stud Book | Deceased |
| IRISH BLOSSOM | Mare | BLACK | 71672 | 06/09/1980 | Stud Book | Not Eligible |
| IRISH CHARMER | Stallion | BROWN | 38526 | 17/11/1971 | Stud Book | Deceased |
| IRISH CREAM | Mare | PALOMINO | C1-151488 | 09/09/1994 | First Cross | Not Eligible |
| IRISH EYES | Mare | CHESTNUT | 497 | 01/10/1960 | Stud Book | Deceased |
| IRISH FEAR | Mare | CHESTNUT | B2-190721 | 29/10/1989 | Breeding Purposes Only - Second Cross | Deceased |
| IRISH FLYER | Mare | BAY | 57355 | 07/10/1971 | Stud Book | Deceased |
| IRISH GIRL | Mare | BAY | 43162 | 01/01/1972 | Stud Book | Deceased |
| IRISH LADY | Mare | BROWN | 72413 | 11/11/1979 | Stud Book | Not Eligible |
| IRISH LAIRD | Stallion | CHESTNUT | F28059 | 22/01/1981 | Foal Recorded | Not Eligible |
| IRISH LAW | Stallion | DUN | 28659 | Stud Book | Not Eligible | |
| IRISH MELODY | Mare | BAY | 2186 | 01/05/1968 | Stud Book | Deceased |
| IRISH MERCI - HSH | Mare | BLACK/GREY | 173357 | 02/11/2004 | Stud Book | Eligible |
| IRISH MIST | Mare | GREY | 18760 | 01/02/1971 | Stud Book | Deceased |
| IRISH RAGE | Mare | CHESTNUT | 35266 | 16/10/1972 | Stud Book | Not Eligible |
| IRISH ROSEMARIE | Mare | BROWN | 1768 | 01/08/1962 | Stud Book | Deceased |
| IRISH SONG | Stallion | BAY | 14284 | 03/09/1969 | Stud Book | Deceased |
| IRISH TRALEE | Mare | BAY | 41847 | 03/02/1973 | Stud Book | Not Eligible |
| IRISH TUDOR | Stallion | CHESTNUT | 35227 | 23/10/1969 | Stud Book | Deceased |
| IRON BARKER!S WARLORD | Gelding | CHESTNUT | 69531 | 01/11/1972 | Stud Book | Deceased |
| IRON COMMANDO | Stallion | BLACK | F30664 | 11/12/1981 | Foal Recorded | Deceased |
| IRON MAN | Stallion | GREY | F31308 | 14/01/1981 | Foal Recorded | Deceased |
| IRON PRINCESS | Mare | CHESTNUT | C1-249357 | 20/10/2017 | First Cross | Not Eligible |
| IRON REGARD - HSH | Gelding | BUCKSKIN | 255388 | 13/09/2019 | Stud Book | Not Eligible |
| IRON STONE FURY | Gelding | CHESTNUT | 55080 | 06/11/1977 | Stud Book | Not Eligible |
| IRON STONE TREASURE | Mare | CHESTNUT | 55081 | Stud Book | Not Eligible | |
| IRON WOODS | Mare | CHESTNUT | 55873 | 22/09/1977 | Stud Book | Not Eligible |
| IRONA | Mare | BAY | 18667 | Stud Book | Deceased | |
| IRONBARK | Gelding | BROWN | C1-123977 | 01/01/1989 | First Cross | Not Eligible |
| IRONBARK ARCADIA - HSH | Mare | BROWN | 190813 | 26/12/2004 | Stud Book | Not Eligible |
| IRONBARK BARNABY - HSH | Gelding | BAY | 230196 | 01/10/2005 | Stud Book | Not Eligible |
| IRONBARK BESS | Mare | GREY | 4774 | Stud Book | Deceased | |
| IRONBARK CHAUFFER - HSH | Gelding | BLACK | 184125 | 16/10/2004 | Stud Book | Eligible |
| IRONBARK CHINA DOLL | Mare | CHESTNUT | C1-242083 | 02/10/2014 | First Cross | Eligible |
| IRONBARK CLASSICAL JAZZ | Mare | CHESTNUT | C1-160737 | 23/11/1992 | First Cross | Not Eligible |
| IRONBARK CONCHITA | Mare | BAY | 139352 | 23/09/1999 | Stud Book | Eligible |
| IRONBARK EVE - HSH | Mare | BAY | 128921 | 09/01/1997 | Stud Book | Not Eligible |
| IRONBARK FAVOUR - HSH | Gelding | BAY | 235197 | 20/09/2008 | Stud Book | Not Eligible |
| IRONBARK FELIX - HSH | Gelding | BLACK | 227712 | 14/12/2005 | Stud Book | Not Eligible |
| IRONBARK FINCH - HSH | Mare | BLACK | 230197 | 04/12/2010 | Stud Book | Not Eligible |
| IRONBARK FINESSE - HSH | Mare | BROWN/BLACK | 242490 | 28/09/2013 | Stud Book | Not Eligible |
| IRONBARK FIREFLY - HSH | Mare | CHESTNUT | 227578 | 05/10/2001 | Stud Book | Not Eligible |
| IRONBARK FLINT - HSH | Gelding | CHESTNUT/GREY | 193763 | 28/02/2007 | Stud Book | Not Eligible |
| IRONBARK FORTUNE | Mare | BAY | 139351 | 27/10/1999 | Stud Book | Not Eligible |
| IRONBARK GEORGIA - HSH | Mare | BAY | 171623 | 16/11/2002 | Stud Book | Not Eligible |
| IRONBARK ISABELLA - HSH | Mare | BAY | 227834 | 18/12/2009 | Stud Book | Eligible |
| IRONBARK JUST TELES | Gelding | BROWN | C1-242491 | 30/08/2014 | First Cross | Not Eligible |
| IRONBARK LIBERTY - HSH | Mare | CHESTNUT | 190814 | 24/10/2006 | Stud Book | Not Eligible |
| IRONBARK MAGNET - HSH | Stallion | BLACK | 145131 | 16/09/1999 | Stud Book | Eligible |
| IRONBARK PEARL - HSH | Mare | BAY/GREY | 190815 | 21/12/2003 | Stud Book | Eligible |
| IRONBARK PH - HSH | Gelding | BLACK | 193764 | 11/09/2000 | Stud Book | Not Eligible |
| IRONBARK REAL STEEL - HSH | Gelding | GREY | 247676 | 25/12/2014 | Stud Book | Not Eligible |
| IRONBARK SAL | Mare | GREY | 4773 | 01/01/1968 | Stud Book | Deceased |
| IRONBARK SERENA | Mare | BAY | 243871 | 07/11/2014 | Stud Book | Eligible |
| IRONBARK SMITHY - HSH | Gelding | BLACK/GREY | 139884 | 25/08/1998 | Stud Book | Eligible |
| IRONBARK SMOKY | Mare | GREY | 4775 | Stud Book | Deceased | |
| IRONBARK SUGAR RAY - HSH | Gelding | BAY | 190816 | 19/09/2000 | Stud Book | Not Eligible |
| IRONBARKGROVE GUNS AND ROSES | Gelding | BAY | C1-189520 | 01/11/2006 | First Cross | Not Eligible |