- Contenance II, Holst (of: Feldherr – Grundyman)
- Contenance III, Holst (of: Grundyman)
- Contender, Holst (of: Calypso II – Ramiro – Ladykiller)
- Conterno Grande, OL (of: Contender – Grannus – Ramino)
- Continue, OL (of: Contender – Tin Rocco)
- Cor de la Bryére, SF (of: Rantzau – Lurioso)
- Corbala, Holst (of: Aldato)
- Cordalmé Z, OL (of: Cor de la Bryére – Almé – Lavendel)
- Cordelia, Holst (of: Ladykiller)
- Coriander, Holst (of: Coriolan – Gotland)
- Coriolan, Holst (of: Calypso II – Capitano – Cottage Son)
- Corland (of: Cor de la Bryére – Landgraf I – Ronald)
- Corporal, Holst (of: Cottage Son)
- Corrado I, Holst (of: Cor de la Bryére – Capitol I)
- Cortina, Holst (of: Ladykiller – Cottage Son)
- Cortina VII, Holst (of: Silbersee, ex Hozeville – Coriolan – Ladykiller)
- Cottage Son, xx
- Couleur Rubin, OL (of: Cordalmé Z – Grannus – Ramino)
- Covert Side
- Cranach, xx
