Hello Mariano.I have no direct information on the Pole family in Spain, but your family tradition of descent from an English family who fled to the continent in the 16th century to escape persecution is very important indeed.Your family could descend from the De La Pole family, which was originally from Normandy, whose name later became Pole in England when the "De La" was dropped.Some of that family did run into trouble with the kings; however, I really don't know much of the details - or of their fleeing to the continent.I just know that one or more of them were charged with treason and may have been executed.
But, I think your family is much more likely to have descended from the Welsh Pole family, who were also once called "De La Pole."These Poles are generally recognized as being descendants of the early Princes of Powis (in Wales), but the detail of that descent has been lost.However, they can also be traced back through some of their female ancestors to the Roman Emperor Claudius.They were also descended from Charles Martel, Charlemagne, and many other very famous people.
And then, in about 1491/1494, Sir Richard Pole, a Knight of the Garter, married Margaret Plantagenet, daughter of George Plantagenet, Duke of Clarence, by his wife, Isabel Neville, daughter of Richard Neville, Earl of Warwick, the legendary "Kingmaker."George Plantagenet was a brother of Kings Edward IV and Richard III of England.
When the Plantagenets lost the War of the Roses to their Tudor cousins, King Henry VII executed the last male Plantagenet, then married Elizabeth, daughter of King Edward IV, thus removing any further Plantagenet pretenders to the throne and uniting the formerly warring families.
Margaret (Plantagenet) Pole and her family were not persecuted by King Henry VII because her descendants, even her sons, were no threat to the Tudor kings because at that time the crown could not pass through a woman.But later, when Margaret was over 70, the entire Pole family became the target of the wrath of King Henry VIII after his break with the Catholic Church - because Margaret's son, Cardinal Reginald Pole, strongly disagreed with that break.The Cardinal was safely on the continent and under the protection of the Pope, so Henry VIII set about to destroy the Cardinal's family back in England.Margaret was beheaded, and is famous as "the last of the Plantagenets."
And then after the death of Henry, and then the death after only about five years of his only son, King Edward VI, Parliament decided to give the crown to King Henry's first child - a woman!, Queen Mary I of England.Once that was done, it made all the descendants of Margaret (Plantagenet) Pole, with the sons having precedence, pretenders to the throne - and thus threats to the Tudors and later the Stuarts.
So for the next century the Poles were under constant persecution.Time after time, as the male descendants reached maturity, they died in mystereious ways, were driven into exile, or they were charged with treason and executed.They were a natural attraction to all the remaining Catholic sympathisers in England.
The persecution of the Poles became so bad that they stopped recording the birth of their children, especially their sons.And many of them fled England.These attempts to hide their children eventually led to the loss of detail about their descent.Only family traditions of their descent from the famed Plantagenet Poles remained.
Some of their descendants in America have the tradition of descent from Margaret (Plantagenet) Pole.I believe those traditions are true.And your family tradition might very well be true too - you could easily be a descendant of Margaret (Plantagenet) Pole.
I published a book in 1995 on the history of my family, entitled "Moran Exodus From Offaly."It includes a chapter on the Pole family and another on the Plantagenet family.It explores the evidence concerning the American descent and discusses their troubles in England and the hiding of their families.I wish you could read this book, but you apparently live in Madrid.I have placed some of the books in libraries, but the nearest library to you is the National Library of Ireland in Dublin.I still have some of the books for sale, but to buy the book and ship it all the way to Spain would be very expensive.The book sells for $75.00 each, including $5.00 for shipping and handling in the U.S.A.But to ship it to Spain would cost a lot more than $5.00; I shipped one to Oxford, England, recently, and it cost $35.00!