As odd this may sound, it is the truth. The British Royal family has Arab Muslim descendants (maybe some other ethnic groups too) but what is so interesting is that Queen Elizabeth II is believed to have descended from the Prophet Muhammad (PBUH)
Here it would be important to mention that if looked at, lot of Egyptians, Lebanese and other Arab cultures would find themselves descending from the crusaders. It is all interconnected and it should not be a surprise that Queen Elizabeth II descended from the Prophet Muhammad (PBUH)
Most astounding among these myths is the claim that she is from the lineage of the Prophet Muhammad (PBUH), from his 43rd generation, via her Spanish-Muslim ancestry. Although disputed, genealogical records of early-medieval Spain also support the claim.Also read : Strange Rules the Royal family Cannot Refuse to Follow
It is claimed by some historians that Queen Elizabeth belongs to the family of Abu al-Qasim Muhammad ibn Abbad, a descendant of Muhammad (PBUH) through his daughter Fatima (RA) and grandson Hasan ibn Ali (RA).
Here’s the press release by United Press International
The study by Burke’s Peerage suggested that the Queen descended from a Muslim princess called Zaida, who fled her hometown Seville in the 11th century before converting to Christianity. Zaida was the fourth wife of King Al-Mu’tamid ibn Abbad of Seville. She bore him a son, Sancho, whose descendant later married the Earl of Cambridge in the 11th century.
However, historians are divided over Zaida’s origins. Some believe she was the daughter of a wine-drinking caliph descended from the Prophet, while others say she married into his family.
Here's the ancestry in full: