Two prominent members of the Bamburgh family had the name Uhtred. The first is a younger brother of the aforementioned Ealdred of Bamburgh. This Uhtred in 911, with the help of King Edward, purchased land in Derbyshire, on the border of Mercia, a vassal of Edward. He fought at the Battle of Corbridge in 918, when Ealdred allied himself with the Scots and was defeated by the Viking warlord Ragnall. Uhtred was with Ealdred in 920 at a peace conference in Bakewell, Derbyshire, where Edward oversaw a treaty ending the war between Ragnall and the Bamburgh-Scots alliance. He was also with his brother at King Æthelstan's court in the 930s, where he was recorded as a Dux (Ealdormen/Earl). An Ealdormen named Uhtred regularly attended the court of Wessex until 949, but it is unknown if this is the same Uhtred or not.
The more well-known Uhtred of Bamburgh is the Ealdormen Uhtred, who presided over the fortress of Bamburgh from 1006 to 1016, commonly referred to as Uhtred the Bold. Bernard Cornwell, the author of the original Saxon Stories novels, on which The Last Kingdom is based, claims he is descended from Uhtred the Bold and that discovering this fact late in life was his reason for writing the novels. This Uhtred was the son of Waltheof, Ealdormen of Bamburgh. When the Scots invaded in 1006, besieging the town of Durham, Waltheof was too ill to lead his troops; thus, the responsibility fell to Uhtred. At Durham, Uhtred won a decisive victory, which earned him the favour of King Æthelred II of England (978-1016). The battle was later made famous as Uhtred had the heads of the dead Scots displayed upon stakes on the walls of Durham. For his victory, the king appointed Uhtred Ealdormen of Bamburgh despite Waltheof still being alive. He was later given the lordship of Yorkshire, making him Ealdormen of all Northumbria and one of the most powerful men in the kingdom. Uhtred's loyalty to his king would be tested in 1013 when King Sweyn I of Denmark invaded England in pursuit of conquest. Upon Sweyn's arrival near the Northumbrian border, Uhtred submitted to the invader at Gainsborough to preserve his lands and title. Meanwhile, Æthelred fled to Normandy. When Sweyn died the following year, Uhtred was likely amongst those who welcomed back Æthelred upon the condition that he 'govern them better than he did before'. Acknowledging his weak position and to bind the Northumbrian Ealdorman closer to the crown, Æthelred gave his daughter in marriage to Uhtred in 1015, enhancing his status by making him a member of the royal family and son-in-law to the king. Yet, with the return of the Danes in 1016, the Anglo-Danish conflict was renewed by Æthelred's son, Edmund and Sweyn's son, Cnut.
Uhtred once again could not be counted upon by the House of Wessex. He began on Edmund's side, supporting him with a northern army. Together, they plundered the lands of the Ealdormen of Mercia, who had sided with Cnut, as a warning to anyone who harboured similar intentions. Yet, once again, when Cnut marched north, threatening Uhtred's land, he abandoned Edmund and submitted to the Danes. Cnut, who became England's new king, distrusted Uhtred due to his previous treachery and wanted his own Scandinavian ally, Eirik of Hlathir to govern the north instead. Thus, in 1016, Cnut invited Uhtred to meet him; during the journey, he was ambushed and murdered along with his retinue. The killer, Thurbrand the Hold, had struck the first blow of a long-lasting blood feud; he was killed by Uhtred's son, who likewise was killed by Thurbrand's son, who's sons were killed by Uhtred's great-grandson, Earl Waltheof. Waltheof, ironically, shared his great-grandfather's fate, being executed on the orders of a foreign conqueror, King William I, in 1076, as referred to earlier. After Uhtred's death, his domains were split into two, and the future lords of Bamburgh's authority would remain north of the River Tyne.
Bernard Cornwell's Uhtred, while not entirely based upon these two historic Uhtreds, shares many elements of their story. The first Uhtred, who had land in Derbyshire, was active for the periods covered in seasons four and five of The Last Kingdom. He became an Ealdormen in Mercia and served at King Æthelstan's court as the show's Uhtred did. However, we have such little information on this Uhtred that it is difficult to make comparisons. For Uhtred the Bold, while he was from a later historical period, we find some parallels between him and the show's Uhtred. Both were celebrated warriors who won significant battles at Durham. They both were senior figures in the regime of a West Saxon king who's kingdom was threatened by Viking invasion. Both Uhtreds also betrayed their English kings (Alfred and Æthelred II), siding with the Danes and then siding with the English again. These figures may have been the historical inspiration for Uhtred in some ways. Yet, the defining aspects of Uhtred's character that make him stand out in The Last Kingdom: his mix of knowledge of both Dane and Saxon cultures, his military victories, his awkward relationships with the kings he served, his devoutness to the Norse Gods, while living in a Christian crusading kingdom, which regarded Pagans as the eternal enemy and his undying determination to win back his ancestral fortress, all comes from Bernard Cornwell's imagination, rather than any historical figure(s).