He is considered one of the two foundation ponies for the Welsh Mountain Pony.

For More Information on COED COCH GLYNDWR see:

Significant Welsh Cobs and Ponies

Welsh Pony

"Trying to find the correct place to start with the ponies that Mr. Goodrich imported and owned is difficult. Three "landmark" stallions of Welsh pony history seem to play the major role: Dyoll Starlight, Bowdler Brightlight, and COED COCH GLYNDWR." For complete article see: http://www.bristolponies.com/texas_stud.htm. Rocko has 11 crosses to COED COCH GLYNDWR in his pedigree.