Ok I'll take Raggedy's go
M P
Mario Puzo
Minnie Pearl
Mary Pickford
Not
Mary poppins
Mario Puzo
Minnie Pearl
Mary Pickford
Male
Not
Mary poppins
Mario Puzo
Minnie Pearl
Mary Pickford
Martha Plimpton
Mathew Perry
Dead
Male
Not
Mary poppins
Mario Puzo
Minnie Pearl
Mary Pickford
Real but dead male
Not
Mary Poppins
Mario Puzo
Minnie Pearl
Mary Pickford
Maurizio Pollini (although may be still alive?)
European?
THis is really spooky, there must be conservatively 100's of MP's and Marcel Proust is not top of most people's list, however Raggedy obviously can see into my mind and she is Correct .

Oh, I do apologize if I caused a delay in the game. I just threw out a wild guess and then had an interruption.
G A
Yes to Gene Autry

As Hiama just said, it is spooky. Maybe we've been hanging around here too long.