| Cavalo | Pai | Avô Materno |
| Uchin van Schuttershof | Chin Chin | Power Light |
| Ugano Sitte | Clinton | Avontuur |
| Ulrich Z | Darco | Ramiro Z |
| Ulysses M2S | Ekstein | Voltaire |
| Umidwar vh Juxschot Z | Unique II Drum | Missouris II |
| Un Blanc des Blancs | ||
| Unbelievable Darco | Darco | Grandeur |
| Untouchable | Olivi | Cartusch |
| Untouchable *Alia | Quick Star | Corrado I |
| Untouchable Z | Hearthbreaker | Burggraaf |
| Uno de Laubry | Galoubet A | Laudanum xx |
| Up to Date | Voltaire | Lys de Darmen |
| Up to Date Miltoo | Darco | Grandeur |
| Upsillon vd Heffinck | Clinton | Darco |
| Urban | Darco | Rex Magna xx |
| Us Hero | Baloubet du Rouet | Fantastique |
| Ustinov | Libero H | Nimmerdor |
| Utah | Indoctro | Libero H |
| Utah Z | Quick Star | Corrado I |