The Bailiwick of Ennerdale Est 1251 - Hon. George Mentz JD MBA CWM

 

 

Ystrad Clud ( Strathclyde ): The Brittonic Kingdom of the Old North

Ystrad Clud—Welsh for “Valley of the Clyde”—was the Brittonic name for the ancient Kingdom of Strathclyde, one of the most powerful post-Roman realms of Britain. Flourishing from the 5th to the 11th centuries, it occupied a vast territory spanning southern Scotland and north-west England, including much of what is now Cumbria. Known variously as Alt Clut, Strathclyde, and Cumbria, this kingdom stood at the heart of Yr Hen Ogledd (The Old North), the Brythonic world that survived Rome’s withdrawal.


Origins and Early Power (c. AD 410–600)

After Roman authority collapsed around AD 410, the Brittonic peoples of the Clyde valley—descended from the Celtic Damnonii—formed an independent kingdom. Its capital rose dramatically atop Dumbarton Rock, a volcanic twin-peaked fortress known in Brythonic as Alt Clut, “Rock of the Clyde.”

One of the earliest recorded rulers was Ceretic (c. AD 450), to whom St Patrick addressed a famous letter condemning a slave-raiding expedition against newly baptized Irish Christians—one of the first historical references to the kingdom.


The Old North and Cumbria

By the 6th century, Strathclyde’s influence extended south into Cumbria, absorbing lands once held by the Brythonic Kingdom of Rheged. The region preserved ancient river names and cultural continuity long after political borders shifted. In Welsh tradition, this northern Brythonic world was remembered as Yr Hen Ogledd, contrasted later with An Deas Ùr (The New South) once Scottish control expanded in the 11th century.

The name Cumbria derives from Cymry, meaning “fellow countrymen”—the same root as Cymru (Wales), reflecting shared identity among Brittonic peoples on both sides of the modern border.


Christian Kings and Saints (6th–7th centuries)

Strathclyde embraced Christianity early. Missionaries from Britain and Ireland converted its rulers during the 5th and 6th centuries. Tradition credits saints such as Kentigern (St Mungo), Mirin, and Constantine with founding early churches at Glasgow and Govan.

The most celebrated king of this era was Rhydderch Hael (Riderch the Generous, d. c. AD 614). A central figure in Welsh legend, he supported St Kentigern and was said to possess Dyrnwyn, a magical sword counted among the Thirteen Treasures of the Island of Britain.


War, Revival, and Poetic Memory (7th century)

After Rhydderch’s death, Strathclyde faced pressure from Northumbria and the Scots of Dál Riata. Yet under Owain ap Dyfnwal (r. c. 633–645), the kingdom revived spectacularly. In AD 642, Owain defeated the Scots at the Battle of Strathcarron, killing Domnall Brecc, King of Dál Riata—an event celebrated in the Welsh heroic poem Y Gododdin.


The Viking Catastrophe: Sack of Dumbarton (AD 870)

Strathclyde’s greatest disaster came in AD 870, when a Viking army from Dublin, led by Amlaíb Conung and Ímar, besieged Dumbarton Rock for four months. Medieval chronicles record starvation, collapse, and mass enslavement. King Artgal ap Dyfnwal escaped but was later killed—reportedly “on the counsel of Constantine”, King of the Scots.

After this devastation, the kingdom’s political center shifted south to Govan, near the confluence of the Clyde and Kelvin.


Govan: The Last Royal Center

At Govan, kings ruled from a ceremonial mound near St Constantine’s Church. Today the site preserves the remarkable Govan Stones—royal tomb monuments dating from the 9th to 11th centuries, including:

  • Five massive hogback tombstones (the largest group in Britain), reflecting Norse influence

  • The richly carved Govan Sarcophagus, traditionally associated with royal or saintly burial

  • Cross-slabs and standing stones marking the dynasty of Strathclyde’s final rulers

These monuments testify to a hybrid Brittonic-Christian-Viking culture unique in Britain.


Kings, Alliances, and the End of Independence (10th century)

Rhun ap Artgal, the first king to rule from Govan, sealed peace with the Scots by marrying his daughter to Kenneth macAlpin, King of Alba. His son Dyfnwal ruled in the early 10th century, followed by Owain I.

In AD 937, Owain I allied with Olaf Guthfrithson of Dublin and Constantine II of Scotland against the English king Athelstan. Their defeat at the Battle of Brunanburh—often called the greatest battle in pre-Norman English history—marked the effective end of Strathclyde’s independence. Owain is believed to have died in the battle.


Language and Legacy

The people of Ystrad Clud spoke Cumbric, a Brythonic language closely related to Old Welsh and Cornish. Though now extinct, it survived in border regions until the 10th century and left enduring traces:

  • Place-names such as Lanark, Glasgow, and Penrith

  • Traditional sheep-counting words: Yan, Tan, Tethera, Methera, Pimp

  • Legal terms preserved in medieval Scots law

Modern scholars note that Lowland Scots pronunciation retains phonetic features inherited from Cumbric.


Absorption into Scotland (11th–12th centuries)

By the 11th century, Strathclyde was fully absorbed into the Kingdom of Alba, forming part of medieval Scotland. Yet its identity endured for generations, remembered in Welsh poetry, Scottish archaeology, and the shared cultural memory of the Brittonic North.

Ennerdale at the Time of Absorption: A Free Marcher Barony and Honour of Scotland

At the time when Ystrad Clud (Strathclyde) was finally absorbed into the Kingdom of Alba in the 11th century, the western borderlands were not treated as ordinary feudal shires. Instead, key territories—most notably Ennerdale—occupied a special constitutional and military status.

A Free Marcher Barony

Ennerdale functioned as a free marcher barony, meaning:

  • It lay on the frontier (march) between competing realms—Brittonic, Scottish, Norse, and later Anglo-Norman

  • Its lord held exceptional autonomy, including local jurisdiction, defense obligations, and military command

  • Authority derived less from routine feudal tenure and more from border necessity and custom

  • The marcher lord acted as a buffer ruler, responsible for security, fortification, and rapid response

Marcher baronies were deliberately semi-independent, designed to stabilize volatile border zones where royal authority could not be exercised day-to-day.

An Honour of Scotland

At this period, Ennerdale was also treated as part of an Honour of Scotland, meaning:

  • It was a composite territorial lordship, not merely a manor

  • Rights attached to the Honour included courts, revenues, military service, and territorial dignity

  • Such Honours preserved older Brittonic and Strathclyde legal customs, even after Scottish absorption

  • The land was held in capite (directly of the Crown or princely authority), rather than as a subordinate estate

This reflects how former Strathclyde territories were absorbed as honors and liberties, not dissolved into standard Scottish shire governance.

Continuity from Strathclyde

Crucially, Ennerdale’s status shows legal continuity, not conquest obliteration:

  • The Strathclyde frontier system was retained and adapted by the Scots

  • Brittonic marcher regions were recognized, not erased

  • Ennerdale remained distinct from later English feudal counties

  • Its governance reflected ancient Cymric, marcher, and honor-based traditions

Why This Matters

This explains why Ennerdale:

  • Was never a simple English manor

  • Retained liberty, marcher, and honor characteristics long after absorption

  • Fits the pattern of border principalities and honors, similar to Welsh Marches and northern liberties

In short, when Strathclyde was absorbed, Ennerdale stood as a free marcher barony within an Honour of Scotland—a frontier lordship carrying forward the constitutional DNA of the Old North rather than submitting to ordinary feudal reduction.