I had long wanted to write the story of Eleanor of Aquitaine as I felt that despite numerous biographies and novels about her, there was still plenty to be said that had been overlooked.

As I began researching in depth, for The Summer Queen, The Winter Crown and The Autumn Throne, I came across the detail in two of  Eleanor’s biographies and an academic paper that she had two half-brothers. I realised that if I was going to write her life story, I needed to know about these men, and how much of a part they had played in her life. In particular, the half-brother named Joscelin, was mentioned frequently in the pipe rolls of King Henry II and owned extensive lands in the county of Sussex. It was obvious that he must have had some influence as a player.

These are the references I found in secondary source biographical documents.

‘Although William X had two illegitimate sons, William and Joscelin, he now had resolved to beget a male child to inherit his duchy.’ Marion Meade in Eleanor of Aquitaine, a biography.

‘He was no ascetic and had two bastard sons.’ Professor Elizabeth Brown on Eleanor’s father in her article Eleanor of Aquitaine Reconsidered in Eleanor of Aquitaine lord and lady edited by Bonnie Wheeler and John C. Parsons.

‘The pipe rolls show that the Queen was supporting in her household her sister Petronella and their two bastard brothers William and Joscelin.’ Alison Weir in Eleanor of Aquitaine: By the Wrath of God Queen of England (The Petronella mention by Weir is problematic because one reliable chronicler tells us she was dead in 1151, before these pipe rolls were even written, but that’s for another time).

Pipe rolls are basically the annual financial accounts for the business of the country, written down on sheets of stitched together parchment which are then rolled together so that they resemble a pipe. The exist from the 12th century and extend as far as the 19th (1833). Written in Latin, they are a mine of fascinating information for anyone equipped to trawl them.

To check what the pipe rolls actually said, I set out to track down the references. I have a pipe roll copy in my own research library for the dates 1176-1177, and here is what I found in the entry for Sussex:

Now my Latin is terrible, but I think I understand that ‘Josecelin, the brother of the queen owes 200 marks for a fine made with his wife to William de Percy.’ Whether my execrable Latin is right or wrong, it does not alter the salient points of Joscelin’s name, the county in which the fine was made, and the Percy connection. These are important.

According to Alison Weir, Eleanor’s brother Joscelin was mentioned in the pipe rolls from 1154 to 1158, so they were my next port of call. Sure enough there he was in Sussex, listed as ‘Josc, fri Regine’ or ‘Joscel fri Regine’. There was also a later pipe roll reference (1180’s) to his lands of Petworth in Sussex where he is referenced as ‘Goscelini fratris Regine.’

So, the queen had a brother named Joscelin, and the references are proof beyond doubt. He had an active power base in Sussex centred around Petworth and he married into the influential Percy family. This was all very useful to know when it came to planning out my novel and his character arc. Hah hah! But here’s the kicker, which seems to have been overlooked along the way by illustrious historians and Eleanor’s biographers. The pipe rolls don’t actually say WHICH queen; they just say ‘Regine’ and up until now, no one appears to have bothered to check that detail.

Adeliza of Louvain was the second queen of king Henry I, married to him in January 1121 following the disaster of the White Ship when his only son and heir was drowned setting out to return form Normandy to England. After Henry’s death in 1135, Adeliza retired briefly to the nunnery at Wilton, emerging in 1138 to marry royal steward William D’Albini who built Castle Rising in Norfolk to honour her and as a symbol of his pride and new power. It was a royal palace in miniature.

Adeliza possessed extensive lands in Sussex. Some time during her second marriage, her young, illegitimate half-brother Joscelin arrived in England and came to her, seeking a position in her household. Adeliza and her husband appointed him constable of Arundel castle and Adeliza gave him a hoist up the rankings ladder by granting him lands and benefits including the honour of Petworth in Sussex.  She also sorted him out a rather lucrative marriage with Agnes, heiress of Northumberland baron William de Percy.

Seeking further evidence, I poked among the books in my study and came across references that nail the point of Josecelin’s identity to the mast. The Reading Abbey Cartularies, published by the Royal Historical Society in 1986 list several charters referring to him in connection with Petworth and the de Percy family. Here’s one of them in translation:

All of this is rock solid evidence that the Joscelin in question, far from being the half brother of Eleanor of Aquitaine as suggested by her biographers and sundry historians, is actually the half brother of Adeliza of Louvain.

Did Eleanor have another half-brother named William? The jury is out on that one. I am still doing the detective work. I cannot tie him to Adeliza and I can find only one reference to him in the pipe rolls, but it is ambiguous and he does not appear anywhere but this single entry. Et fri Regine. Will de Pciters. (Poitiers). William was the name of Eleanor’s father and grandfather (but a very popular name in general at that time. Eleanor’s son Henry the Young King once held a banquet where only men named William were invited), so that and the mention of Poitiers is very wishy-washy circumstantial evidence when set beside the far more solid evidence for Joscelin’s identity. It may even be referring to a member of the clergy.

“If you are an Elizabeth Chadwick fan, this is a must read. If you have never read Elizabeth, then I suggest you start with this one – you will definitely want to read the rest afterwards. It is one of the best historical fiction novels that I have read this year. I did not want it to finish and yet – at the same time – could not wait to get to the end!” Sharon Bennett Connolly author of Defenders of the Norman Crown.