This wasn't the name of one of the daughters of the Prophet (he only had one daughter, Fatima). However, Ruqayya was the name of one of the daughters of Imam Husain, the grandson of the Prophet.
― Anonymous User 10/23/2006
1
This is a mistaken comment. Muhammed the prophet did have 4 daughters. Their names were: ZAYNAB - FATIMA - RUQAYYA and Umm Kulthum. I don't know were the above user got this comment from but I'm 100% sure of my information.