- Seglerin
- Sendernixe, Hann
- Senta
- Sezuan (de: Blue Horse Zack – Don Schufro)
- Shadow KWG, CH (de: Royal GZ – Calando II – Santos)
- Shaila (de: Calando II – Santos – Cinema)
- Shutterfly (de: Silvio I – Forrest – Gardestern I)
- Sibelle de Fromecs, SF (de: Baloubet du Rouet – Gloster – Gotthard)
- Sieglinde, Hann
- Silbersee, ex Hozeville, SF (de: Silver Matal – Quastor – Ouest France)
- Silka (de: Lepanto – Farnese – Aldato)
- Silva
- Silvano (de: Le Mexico)
- Silver Matal, xx (de: Fortino II)
- Silvester (de: Silbersee, ex Hozeville)
- Silvio I (de: Sandro – Gepard)
- Simonette (de: Fantast)
- Singoalla (de: Drabant)
- Sir Donnerhall, OL (de: Sandro Hit – Donnerhall – Feldherr)
- Sir Sandro (de: Sir Donnerhall – Falkland – Pik König)