 While his paternity was also stated as "unknown", it is speculatively possible that his father was the married banker Auguste Albert Gaston Florian Mollard, a lover of Marthe, from whom she presumably took the name ""de Florian""

Marthe de Florian's apartment is a 1,500 square foot apartment located on the fourth floor at 2, Square La Bruyère in the 9th arrondissement of Paris, not far from Sainte-Trinité.She died in the apartment in 1939.Her son, Henri Beaugiron, who witnessed and signed his mother's death record, was also living in the apartment at the time of her death.