In Nahjul Balagha, Imam Ali (PBUH) referred to Othman ibn Affan as the Prophet's (PBUH&HF) son-in-law, so did…

Answer

In the name of Allah, I do not have evidence that the greatest Prophet (PBUH&HF) had a daughter other than Fatima (PBUH), and the daughters mentioned in your question are either the daughters of Khadija from her first husband, if she was married, or the daughters of her sister Hala who used to live with her and under the care of the Prophet (PBUH&HF). Allah is Guide.