Geschwister von Treharne Blue John

Halbgeschwister Vaterlinie

Zuchtstute Treharne Sheila (Welsh Mountain Pony (Sek.A), 1961, von Treharne Boy Blue)

Treharne Sheila

Deckhengst Treharne Charles (Welsh-Cob (Sek. D),  , von Treharne Boy Blue)

Treharne Charles

Zuchtstute Treharne June (Welsh Pony (Sek.B), 1960, von Treharne Boy Blue)

Treharne June

Deckhengst Pencombe Trumpeter (Connemara-Pony,  , von Treharne Boy Blue)

Pencombe Trumpeter

Zuchtstute Hubbestads Jovette (Welsh Mountain Pony (Sek.A),  , von Treharne Boy Blue)

Hubbestads Jovette