| Trakehner Name | Geschlecht | Geburtsjahr | Vater | Muttertier | Farbe | |
|---|---|---|---|---|---|---|
| Unsightly xx | Stute | 1897 | Pursebearer xx | Hira Villa xx | Unknown | |
| Unsinkable Molly Brown | Stute | Unknown | Unknown | |||
| Unsquare Dance xx | Stute | Unknown | Unknown | |||
| Unstah | Hengst | 1986 | Erzsand *E* | Special Favor Miss | chestnut | |
| Untario | Hengst | Unknown | Unknown | |||
| Untouchable | Stute | 1987 | Habicht | Ufenau | bay | |
| Unverzagt | Wallach | 1992 | Abdullah *Pg*E* | Unabashed | bay (gray) | |
| Uob de Fondelyn (AA) | Stute | Flor II (AA) | Obri de Fondelyn (AA) | Unknown | ||
| Up Again xx | Stute | 1963 | Knockmealdown xx | Eddies Queen xx | Unknown | |
| Upan la Jarthe (AA) | Hengst | 1984 | Pancho II (AA) | Uob de Fondelyn (AA) | dark bay | |
| Upan La Jarthe AA | Hengst | Unknown | Unknown | |||
| Up Late xx | Stute | Unknown | Unknown | |||
| Up N Rising Son | Wallach | 2001 | Mercury Rising | Granny Up xx | bay (gray) | |
| Upper Case xx | Hengst | Unknown | Unknown | |||
| Upper Class | Wallach | 1993 | Inspekteur | Upstart | dark bay/brown | |
| Upper Level xx | Stute | Unknown | Unknown | |||
| Upset xx | Hengst | Unknown | Unknown | |||
| Upstart | Stute | 1983 | Kufstein | Unna | dark brown/black | |
| Up The River xx | Hengst | Unknown | Unknown | |||
| Up The Vale xx | Stute | Unknown | Unknown | |||
| Uptown | Stute | 1998 | Windwalzer *Pg* | Cece | bay | |
| Uptown Girl | Stute | Unknown | Unknown | |||
| Up Town Girl | Stute | 1999 | Hailo *Pg*E* | Ultimate Miss xx | bay/brown | |
| Uptown Girl Talk | Stute | Unknown | Unknown | |||
| Up Wind | Hengst | 1979 | Flugwind | Make It All Up xx | bay |