| Name | Sex | Colour | Registration | Foaling Date | Reg Status | Competition Status |
|---|---|---|---|---|---|---|
| UNDILLA VICKI - HSH | Mare | CHESTNUT | 71498 | 04/12/1981 | Stud Book | Deceased |
| UNDOOLYA ALMANIC | Mare | BROWN | F17648 | 19/11/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA ALPINE | Mare | BROWN | F17651 | 16/11/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA BELLE | Mare | CHESTNUT | 33062 | 26/09/1970 | Stud Book | Deceased |
| UNDOOLYA BELLE DANCER | Mare | CHESTNUT | 31798 | 01/09/1965 | Stud Book | Deceased |
| UNDOOLYA BOLD MAN | Mare | CHESTNUT | F17647 | 01/12/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA CANDY | Mare | GREY | 40561 | 01/01/1974 | Stud Book | Not Eligible |
| UNDOOLYA CHENEL | Mare | CHESTNUT | 31799 | 01/01/1972 | Stud Book | Deceased |
| UNDOOLYA DOTTY | Mare | CHESTNUT | 31797 | 21/10/1967 | Stud Book | Deceased |
| UNDOOLYA DROVER | Gelding | BROWN | 48034 | Stud Book | Not Eligible | |
| UNDOOLYA FLASH | Gelding | CHESTNUT | 48037 | Stud Book | Not Eligible | |
| UNDOOLYA GIPSY | Mare | CHESTNUT | 40560 | 01/01/1974 | Stud Book | Not Eligible |
| UNDOOLYA GOLDEN | Mare | CHESTNUT | 31796 | 01/01/1971 | Stud Book | Deceased |
| UNDOOLYA GUNARAIN | Stallion | GREY | 31791 | 27/09/1972 | Stud Book | Not Eligible |
| UNDOOLYA HAILSTONE | Mare | BAY | F11742 | 22/12/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA HIPPY GIRL | Mare | BROWN | 31803 | 05/11/1966 | Stud Book | Deceased |
| UNDOOLYA JENNIFER SHIRLEY | Mare | GREY | 40563 | 01/01/1975 | Stud Book | Not Eligible |
| UNDOOLYA JODIE | Mare | BAY | 31801 | 01/01/1971 | Stud Book | Deceased |
| UNDOOLYA LIONEL | Gelding | CHESTNUT | 10831 | Stud Book | Deceased | |
| UNDOOLYA MARELLA | Mare | BAY | 31795 | 01/01/1970 | Stud Book | Deceased |
| UNDOOLYA MARYGOLD | Mare | CHESTNUT | 40562 | 01/01/1975 | Stud Book | Not Eligible |
| UNDOOLYA MOON BEAM | Mare | CHESTNUT | 40559 | 01/01/1974 | Stud Book | Not Eligible |
| UNDOOLYA PATCH | Gelding | CHESTNUT | 40558 | 01/01/1970 | Stud Book | Deceased |
| UNDOOLYA POTION | Mare | BAY | F11737 | 22/10/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA RADIATION | Mare | BAY | 31792 | Stud Book | Not Eligible | |
| UNDOOLYA RAINBOW | Mare | GREY | F11741 | 09/11/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA RAINDANCER | Mare | GREY | F17652 | 25/11/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA ROSSCO | Stallion | CHESTNUT | F11740 | 03/01/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA ROSY | Mare | CHESTNUT/ROAN | F11744 | 26/10/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA SHY LADY | Mare | BAY | F11738 | 07/04/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA SILVER | Stallion | GREY | F17650 | 18/11/1978 | Foal Recorded | Not Eligible |
| UNDOOLYA SODA | Gelding | GREY | 48035 | Stud Book | Not Eligible | |
| UNDOOLYA STAR CHERIE | Mare | BAY | 31793 | 01/01/1970 | Stud Book | Deceased |
| UNDOOLYA STARAIN | Mare | BROWN | F11743 | 26/10/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA STARELLA | Mare | CHESTNUT | 31794 | 01/01/1972 | Stud Book | Deceased |
| UNDOOLYA STORM GIRL | Mare | CHESTNUT | F11745 | 08/12/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA SUNSHINE | Mare | CHESTNUT | 48036 | Stud Book | Not Eligible | |
| UNDOOLYA TIMAIN | Mare | BROWN/GREY | F11739 | 08/12/1977 | Foal Recorded | Not Eligible |
| UNDOOLYA TIMID LADY | Mare | GREY | 31802 | 05/09/1967 | Stud Book | Deceased |
| UNDOOLYA TRACY | Mare | BROWN | 40564 | 01/01/1975 | Stud Book | Not Eligible |
| UNDOOLYA VIRGINIA | Mare | BROWN | 31800 | Stud Book | Not Eligible | |
| UNDOOLYA WELMA | Mare | BROWN | F17649 | 17/10/1978 | Foal Recorded | Not Eligible |
| UNDULLA CHAMP | Stallion | BAY/BROWN | F20226 | 26/09/1979 | Foal Recorded | Not Eligible |
| UNDULLA KATIE | Mare | BAY | 6845 | 23/10/1965 | Stud Book | Deceased |
| UNDULLAH ACTRESS | Mare | GREY | 41883 | 01/01/1969 | Stud Book | Deceased |
| UNDULLAH BILLS PET | Mare | BROWN | 41882 | 03/12/1973 | Stud Book | Not Eligible |
| UNDULLAH ROCKY PATRICE | Mare | BROWN | 48779 | 27/09/1973 | Stud Book | Not Eligible |
| UNDULLAH ROCKY SUGAR | Mare | CHESTNUT | 41881 | 30/10/1973 | Stud Book | Not Eligible |
| UNFORESEEN | Stallion | BAY | 77635 | 22/08/1985 | Stud Book | Deceased |
| UNFROSTED | Gelding | CHESTNUT | C2-235174 | 01/12/2011 | Second Cross | Eligible |
| UNGARIE BAMBY | Mare | BAY | 19636 | 05/11/1967 | Stud Book | Deceased |
| UNGARIE MISCHIEF | Gelding | GREY | 33883 | 01/11/1971 | Stud Book | Deceased |
| UNGARIE TRIGGER | Gelding | CHESTNUT | 33882 | 01/10/1972 | Stud Book | Not Eligible |
| UNICA | Mare | BAY/BROWN | 68863 | 06/09/1980 | Stud Book | Not Eligible |
| UNICO TARAJE | Mare | GREY | 80189 | 08/11/1986 | Stud Book | Not Eligible |
| UNICORNPARK GOLD CLASS | Mare | BUCKSKIN | C1-229806 | 25/11/2009 | First Cross | Not Eligible |
| UNICORNPARK SPECIAL LADY | Mare | BAY | C1-193946 | 27/09/2009 | First Cross | Not Eligible |
| UNIE - HSH | Mare | BAY | 490 | 01/08/1960 | Stud Book | Deceased |
| UNINFORMED | Mare | BAY | 77728 | 01/10/1984 | Stud Book | Deceased |
| UNION CINDERS | Mare | GREY | 2128 | 01/11/1970 | Stud Book | Deceased |
| UNIQUE | Mare | BAY | 6268 | Stud Book | Deceased | |
| UNIQUE DESTINYS DESIRE | Stallion | CHESTNUT | C2-238527 | 19/12/2014 | Second Cross | Eligible |
| UNIQUE EDITION | Mare | BLACK | 106649 | 26/10/1987 | Stud Book | Not Eligible |
| UNIQUE FRECKLES - HSH | Mare | CHESTNUT | 103792 | 22/12/1979 | Stud Book | Deceased |
| UNIQUE GEM | Mare | GREY | 259969 | 24/12/2018 | Stud Book | Not Eligible |
| UNIQUE PRINCESS | Mare | CHESTNUT | 31552 | 01/01/1972 | Stud Book | Deceased |
| UNIQUER | Mare | BAY | 19935 | 28/11/1971 | Stud Book | Deceased |
| UNIQUES LITTLE CORN | Mare | CHESTNUT | 168781 | 28/12/2001 | Stud Book | Deceased |
| UNITYS LITTLE SPIN | Mare | DUN | 188123 | 24/08/2008 | Stud Book | Eligible |
| UNIVERSAL BIRTHDAY TOI - HSH | Mare | BAY | 231368 | 19/03/2013 | Stud Book | Not Eligible |
| UNIVERSAL DAUGHTER OF TOI STORY - HSH | Mare | BAY | 231369 | 10/11/2012 | Stud Book | Not Eligible |
| UNIVERSAL PERSISTENCE - HSH | Gelding | BAY | 182216 | 19/10/2009 | Stud Book | Not Eligible |
| UNIVERSAL REGAL TOI - HSH | Gelding | BAY | 231370 | 23/11/2011 | Stud Book | Deceased |
| UNIVERSAL RUSTY TOI - HSH | Gelding | CHESTNUT | 239890 | 12/11/2015 | Stud Book | Not Eligible |
| UNIVERSAL SON OF TOI STORY - HSH | Gelding | BAY | 231371 | 22/12/2010 | Stud Book | Not Eligible |
| UNIVERSAL SUMMER TOI | Gelding | CHESTNUT | C1-252825 | 01/12/2014 | First Cross | Not Eligible |
| UNKNOWN GEM | Mare | GREY | 241737 | 10/10/2009 | Stud Book | Not Eligible |
| UNKSVILLE ADAM | Gelding | BROWN | 53047 | 01/01/1977 | Stud Book | Not Eligible |
| UNKSVILLE GAYLEEN | Mare | CHESTNUT | 74434 | 05/10/1981 | Stud Book | Not Eligible |
| UNKSVILLE MAY ROSE | Mare | BAY | 53046 | 01/01/1975 | Stud Book | Not Eligible |
| UNLUCKY TUDOR | Mare | BAY | 20287 | 18/10/1971 | Stud Book | Deceased |
| UNO LUCY | Mare | BAY/BROWN | 73603 | 26/09/1982 | Stud Book | Not Eligible |
| UNO POPPIE | Mare | BAY | 122402 | 11/11/1992 | Stud Book | Not Eligible |
| UNORA VILLA | Mare | CHESTNUT | 77160 | 11/08/1982 | Stud Book | Not Eligible |
| UNSOLVED | Stallion | BROWN | 25139 | 30/12/1968 | Stud Book | Deceased |
| UNTOLD STORY | Mare | CHESTNUT | C1-198265 | 17/10/1993 | First Cross | Not Eligible |
| UNULLA | Mare | GREY | 21148 | Stud Book | Deceased | |
| UNUMGAR AQUARIUS - HSH | Gelding | BROWN | 135319 | 26/01/1998 | Stud Book | Not Eligible |
| UNUMGAR CHARISMA | Mare | CHESTNUT | 57379 | 03/11/1977 | Stud Book | Deceased |
| UNUMGAR COLLEEN | Mare | BAY | 80120 | 01/08/1987 | Stud Book | Deceased |
| UNUMGAR COOL CAT | Stallion | BAY | 135363 | 12/12/1996 | Stud Book | Not Eligible |
| UNUMGAR LADY JANE | Mare | BAY | 80121 | 08/01/1991 | Stud Book | Deceased |
| UNUMGAR LIGHTNING JACK | Gelding | BAY | 80472 | 01/08/1989 | Stud Book | Deceased |
| UNUMGAR LITTLE LADY | Mare | BAY | 80477 | 20/08/1987 | Stud Book | Deceased |
| UNUMGAR MISTRESS - HSH | Mare | BAY | 102846 | 15/01/1982 | Stud Book | Deceased |
| UNUMGAR MY GIRL | Mare | BAY | 135365 | 16/02/1999 | Stud Book | Not Eligible |
| UNUMGAR MY LETHAL LAD | Gelding | BAY | C1-234365 | 28/12/2012 | First Cross | Not Eligible |
| UNUMGAR MY SECRET | Mare | BROWN | 132013 | 01/12/1998 | Stud Book | Eligible |
| UNUMGAR PATRIA - HSH | Mare | BAY | 57378 | 23/10/1976 | Stud Book | Deceased |
| UNUMGAR PATSY ANN - HSH | Mare | BAY | 47184 | 01/08/1966 | Stud Book | Deceased |