no they never mentioned it
ChaCha's last name is DiGregorio.
Roger Wilko's birth name is Roger Wilkerson.
Didi Conn played Frenchy in The version of grease with Oliva Newton-John and John Travolta !
"Roger" is pretty short itself. But some men with the name "Roger" are addressed as "Roj".
Mooning as a duet with Jan and Rock 'n Roll Party Queen with Doody