Zaynab Bint Muhammad (PBUH) was the first daughter of Prophet Muhammad (PBUH). She was born in Makkah ten years before the announcement of Prophethood of Prophet (PBUH).
Zaynab Bint Muhammad was born to the first wife of Prophet (PBUH), Hazrat Khadija (R.A). Her mother raised her to be a pious and virtuous woman. When she was old enough to marry, she was married to her first cousin Abdul As . After the arrival of Islam she accepted Islam, however, her husband did not accept it but did not force her to change her religion as well. After that she went to Madina to live with her Father. Some years later when Abdul As also accepted Islam and went to Madina, Prophet (PBUH) reunited her with her husband.
She died in 629 CE and rests in peace in Madina.