This comes under the heading of songs I can never sing - my mother's father always called her'Dolly' - she was christened Dorothy, and she had grey eyes - her father used to sing Dolly Gray for her.
He sang There's the sound of soldiers feet, Dolly Gray Marching down the village street Dolly Gray Each one with heart so true will either die or do,So I must say goodbye to you, Dolly Gray' in the second verse, and in the chorus 'see the soldier boys a marching, I can no longer stay'.