Haly's Circus

Haly Circus is a circus that has traveled the world and was very famous for their trapeze act known as the Flying Graysons.

Circus members

 * C.C. Haly (Ringmaster)
 * John Grayson
 * Mary Grayson
 * Dick Grayson

Reference
Hanna Barbera’s Super Friends, Season 1 (1973):
 * The Planet-Splitter