Tanybwlch Berwyn is considered one of the two foundation ponies for the Section B Welsh Mountain Pony. His Grand Sire was the Welsh Mountain Pony "Bledda Shooting Star" son of Dyoll Starlight and his Dam was the Barb "Sahara". Rocko has 13 crosses to Tanybwlch Berwyn.

For More Information on Tanybwlch Berwyn see:

Significant Welsh Cobs and Ponies