One of the world's most renowned genealogy foundations, Burke's Peerage, published a study in 1986 explaining how Queen Elizabeth of England is actually a descendant of Prophet Muhammad.
According to the study, the 91-year-old queen is the 43rd great-granddaughter of the Prophet.
According to Harold Brooks-Baker, then-publishing director at Burke's Peerage:
“It is little known by the British people that the blood of Mohammed flows in the veins of the queen. However, all Muslim religious leaders are proud of this fact.”
How the genealogical lineage was made
Brooks-Baker explained how the blood relation between the British royal family and Prophet Muhammad came to be.
"The British royal family is descended from Mohammed through the Arab kings of Seville, who once ruled Spain. By marriage, their blood passed to the European kings of Portugal and Castille, and through them to England’s 15th century King Edward IV."
Abu al-Qasim Muhammad ibn Abbad, of the Umayyads Caliphate and descendant of Prophet Muhammed, was the first Muslim ruler of the Spanish city, Seville, till his death in 1042. He had formed the Abbadid dynasty which lasted from 1023 till 1091.
Al-Qasim's grandson, Muhammad Al-Mu'tamid, took over Cordoba, Spain, in 1071, and was after dethroned in 1091 by the Almoravids of Morocco.
After the fall of the dynasty, Al-Qasim's daughter, Zaida, married King Alfonso VI, Spanish king of Leon and Castile, later converting to Roman Catholicism.
Two centuries later, Maria de Padilla, a descendant of King Alfonso VI and Zaida, had four children with King Peter of Castile, two of whom married sons of King Edward III of England.
Isabella of Castile, wife of Edmund of Langley - first Duke of York - gave birth to Richard of Conisburgh, Earl of Cambridge.
The controversial Earl of Cambridge later fathered duke of York, Richard Plantagenet, who died at 49 years of age.
Plantagenet had fathered Edward IV, king of England, who ruled the kingdom from1547 until 1553.
And as they say, the rest is history...