How is Queen Elizabeth a descendant of ........

So it seems when i went true Quora i found this question and answer: How is Queen Elizabeth a descendant from the Prophet Mohammed

She is the great (x43) granddaughter of the Prophet, if we can rely on the rather patchy genealogical records of early-mediaeval Spain.

It must be noted, however, that many of our sources from the Dark Ages are disputed or unclear, so it is not possible to make any absolute statements.

The key connections are these:

In 1023, Abu al-Qasim Muhammad ibn Abbad became the ruler of Seville in al-Andalus. He was formerly a qadi (judge) appointed by the Caliph of Cordoba, but seized power and formed his own dynasty, the Abbadids. He was a descendant of Muhammad through his daughter Fatima and grandson Hasan ibn Ali.

In 1091 the Almoravids from Morocco invaded Muslim Spain, and his grandson Al-Mu'tamid ibn Abbad lost his throne. His daughter Zaida fled north and took refuge at the court of King Alfonso VI of Leon. She became his mistress - the king was already married, but his wife was bedridden with illness. Zaida later converted to Christianity, took the baptismal name Isabella and - once the king's previous wife died - married him, bearing him three children that we know of.

In 1352 Maria de Padilla, a descendant of Zaida and Alfonso, became the mistress of King Peter 'the Cruel' of Castille. They had four children - two of the daughters married sons of King Edward III of England. It is from Isabella of Castille and Edmund, Duke of York that the current Queen of the UK is descended.

Here's the ancestry in full:

Elizabeth II, Queen of the UK - daughter of
George VI, King of the UK - son of
George V, King of the UK - son of
Edward VII, King of the UK - son of
Victoria, Queen of the UK - daughter of
Edward, Duke of Kent and Strathearn - son of
George III, King of Great Britain - son of
Frederick, Prince of Wales - son of
George II, King of Great Britain - son of
George I, King of Great Britain - son of
Sophia, Electress of Hanover - daughter of
Elizabeth of Bohemia - daughter of
James I/VI, King of England, Ireland & Scotland - son of
Mary, Queen of Scots - daughter of
James V, King of Scots - son of
Margaret Tudor - daughter of
Elizabeth of York - daughter of
Edward IV, King of England - son of
Richard Plantagenet, Duke of York - son of
Richard of Conisburgh, Earl of Cambridge - son of
Isabella Perez of Castille - daughter of
Maria Juana de Padilla - daughter of
Maria Fernandez de Henestrosa - daughter of
Aldonza Ramirez de Cifontes - daughter of
Aldonza Gonsalez Giron - daughter of
Sancha Rodriguez de Lara - daughter of
Rodrigo Rodriguez de Lara - son of
Sancha Alfonsez, Infanta of Castile - daughter of
Zaida (aka Isabella) - daughter of
Al-Mu'tamid ibn Abbad, King of Seville - son of
Abbad II al-Mu'tadid, King of Seville - son of
Abu al-Qasim Muhammad ibn Abbad, King of Seville - son of
Ismail ibn Qarais - son of
Qarais ibn Abbad - son of
Abbad ibn Amr - son of
Amr ibn Aslan - son of
Aslan ibn Amr - son of
Amr ibn Itlaf - son of
Itlaf ibn Na'im - son of
Na'im II al-Lakhmi - son of
Na'im al-Lakhmi - son of
Zahra bint Husayn - daughter of
Husayn ibn Hasan - son of
Hasan ibn Ali - son of
Fatima - daughter of
Muhammad (pbuh)