Sir John Vaughan SL, of Trawsgoed, was a justice in the Kingdom of England.

Trawsgoed is both a community and an estate in Ceredigion, Wales. The estate is 8 miles (13 km) southeast of Aberystwyth, and has been in the possession of the Vaughan family since 1200. The Vaughans are descended from Collwyn ap Tangno, founder of the fifth noble tribe of North Wales, Lord of Eifionydd, Ardudwy, and part of Llŷn, who had his residence on the site of Harlech Castle.