Von links nach rechts sind, mit leichten Fragezeichen, zu sehen:
Fosca, Doria Manfredi ( etwas overdressed im Sonntagskleid), GP, Elvira und Foscas erste Tochter Franca.
It is confirmed yet that this photo was taken in June, 1903, four months AFTER the accident in the repaired car. Puccini was walking then (and also the next 16 months) on crutches. It's not perceptible here, as it was probably intended by GP.
From left to right, with slight questionmarks:
Fosca, Doria Manfredi (a little bit overdressed in her Sunday best), GP, Elvira and Foscas first daughter Franca.