I thought it was Marsha Brady
Look it up. I just did.
You might see it spelled Marsha occasionally.
I have a book by Greg (cost all of 25 cents). He tells a lot of out of school type stories including the time he had
Marcia naked in his bed room. Fortunately or unfortunately I guess depending who you are, Greg’s Father got suspicious and knocked on the door.
They spent the next few minutes getting dressed and rapidly.