| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| 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 ARCADIA | Mare | BAY | C1-273889 | 01/08/2023 | First Cross | Eligible |
| 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 |
| IRONDOON BONITA | Mare | BAY | 3024 | 01/01/1970 | Stud Book | Deceased |
| IRONFARM ACRES OF GEORGE | Gelding | CHESTNUT | C1-197564 | 15/09/2010 | First Cross | Not Eligible |
| IRONFARM DESTINY | Mare | BAY | C1-197402 | 14/08/2010 | First Cross | Not Eligible |
| IRONGATE ASIA | Mare | BAY | R-261166 | 05/11/2021 | Base Registry | Not Eligible |
| IRONGATE BERNIE | Gelding | BAY | C2-268316 | 29/10/2023 | Second Cross | Not Eligible |
| IRONGATE EGYPT | Gelding | BLACK | C2-261138 | 30/09/2022 | Second Cross | Not Eligible |
| IRONGATE FORTUNE - HSH | Mare | BAY | C2-255480 | 10/03/2008 | Second Cross | Not Eligible |
| IRONGATE LU FIRE | Mare | CHESTNUT/ROAN | R-268473 | 25/10/2023 | Base Registry | Not Eligible |
| IRONGATE NUGGET | Gelding | BAY | C2-255319 | 07/09/2020 | Second Cross | Eligible |
| IRONGATE SUZI | Mare | BAY | R-258565 | 15/10/2016 | Base Registry | Not Eligible |
| IRONGRACE ALIAS | Gelding | CHESTNUT | 257690 | 21/09/2017 | Stud Book | Eligible |
| IRONGRACE CHRYSTAL | Mare | BLACK | 265637 | 01/11/2014 | Stud Book | Eligible |
| IRONGRACE COOL SIZZLER | Mare | BAY | 242952 | 25/10/2013 | Stud Book | Eligible |
| IRONGRACE COUGAR - HSH | Gelding | BLACK | 265357 | 17/11/2022 | Stud Book | Eligible |
| IRONHIDE | Gelding | CHESTNUT | C1-270381 | 12/10/2024 | First Cross | Eligible |
| IRONHURST CLEAR BELL | Mare | BROWN | F12122 | 24/12/1977 | Foal Recorded | Not Eligible |
| IRONHURST CLEAR CUT | Stallion | CHESTNUT | 39362 | 26/12/1975 | Stud Book | Not Eligible |
| IRONHURST D B JESSIE | Stallion | DUN | F41155 | 08/02/1986 | Foal Recorded | Not Eligible |
| IRONHURST ETHEL | Mare | CHESTNUT | 58335 | Stud Book | Not Eligible | |
| IRONHURST FASHION | Mare | BROWN | 32175 | Stud Book | Deceased | |
| IRONHURST JEAN | Mare | BROWN | 32176 | 01/08/1969 | Stud Book | Deceased |
| IRONHURST JESSALENA | Mare | BAY | F37056 | 08/02/1984 | Foal Recorded | Not Eligible |
| IRONHURST JESSIE JOAN | Mare | DUN | F42696 | 12/12/1986 | Foal Recorded | Not Eligible |
| IRONHURST JESSIE LEE | Mare | PALOMINO | F37057 | 22/10/1983 | Foal Recorded | Not Eligible |
| IRONHURST JESSIEANNE | Mare | PALOMINO | 68963 | 26/12/1981 | Stud Book | Not Eligible |
| IRONHURST JESSINA | Mare | BAY | 69131 | 01/01/1983 | Stud Book | Not Eligible |
| IRONHURST JULIE | Mare | GREY | 32179 | 01/01/1973 | Stud Book | Not Eligible |
| IRONHURST LADY BIRD | Mare | BAY | 44772 | 01/12/1975 | Stud Book | Not Eligible |
| IRONHURST LADY BLACK | Mare | BLACK | 32177 | Stud Book | Deceased | |
| IRONHURST LADY JESSIE | Mare | BAY | F39302 | 26/10/1984 | Foal Recorded | Not Eligible |
| IRONHURST MARTAINS JESSIE | Stallion | DUN | 58334 | 09/09/1978 | Stud Book | Not Eligible |
| IRONHURST MARTIE | Stallion | BAY | F34221 | 16/10/1982 | Foal Recorded | Not Eligible |
| IRONHURST MR BELL | Stallion | DUN | F34220 | 25/10/1982 | Foal Recorded | Not Eligible |
| IRONHURST NESSIE | Mare | DUN | F41154 | 03/12/1985 | Foal Recorded | Not Eligible |
| IRONHURST ROYAL | Stallion | BAY | 32182 | 05/12/1974 | Stud Book | Not Eligible |
| IRONHURST ROYAL JULE | Mare | BAY | F22473 | 04/01/1980 | Foal Recorded | Not Eligible |
| IRONHURST SHARK | Mare | BAY | 32181 | 01/08/1968 | Stud Book | Deceased |
| IRONHURST SORRENTO MISS | Mare | BAY | 58816 | 05/11/1977 | Stud Book | Not Eligible |