Mary, Queen of Scots, and Elizabeth I of England are among the most famous rivals in history, yet their connection ran far deeper than political animosity. Worth adding: they were first cousins once removed, bound by blood through the Tudor dynasty, a familial tie that dictated the succession crisis of the sixteenth century and ultimately sealed the Scottish queen’s fate. Understanding this genealogical link is essential to grasping the religious, political, and personal tensions that defined the British Isles during the Elizabethan era.
The Tudor Family Tree: Tracing the Bloodline
The relationship between the two queens originates with Henry VII, the first Tudor monarch. He is the common grandfather of Henry VIII of England and the great-grandfather of Mary, Queen of Scots. To visualize the connection clearly, it helps to break down the lineage step by step.
Henry VII had two daughters who are central to this story: Margaret Tudor and Mary Tudor.
- Margaret Tudor married James IV of Scotland. Their son was James V of Scotland.
- James V married Mary of Guise.
- Their daughter was Mary, Queen of Scots.
- Mary Tudor (Henry VIII’s younger sister) married Charles Brandon, Duke of Suffolk. Their daughter was Frances Brandon.
- Frances Brandon married Henry Grey, Marquess of Dorset.
- Their daughter was Lady Jane Grey (the "Nine Days' Queen"), but this line is a collateral branch.
- Henry VIII (son of Henry VII, brother to Margaret and Mary Tudor) had three children: Edward VI, Mary I, and Elizabeth I.
The Calculation:
- Henry VIII and James V of Scotland were nephews of each other (Henry VIII was the uncle of James V via Margaret Tudor).
- Elizabeth I (daughter of Henry VIII) and Mary, Queen of Scots (daughter of James V) were therefore first cousins once removed.
In simpler terms: Elizabeth’s father (Henry VIII) was the older brother of Mary’s grandmother (Margaret Tudor). This made Elizabeth the great-niece of Margaret Tudor and the first cousin once removed of Mary Stuart.
The Succession Question: Why Blood Mattered
In the sixteenth century, genealogy was not merely a matter of family trees; it was the foundation of political legitimacy. Even so, the Tudor dynasty was relatively new, founded on the battlefield at Bosworth in 1485. Henry VIII’s obsession with a male heir stemmed from the fear that the dynasty would die out, plunging England back into the Wars of the Roses And that's really what it comes down to. Nothing fancy..
When Henry VIII died, his will and the Third Succession Act (1544) established the line of succession: Edward VI, then Mary I, then Elizabeth I. So crucially, Henry VIII explicitly excluded the Stuart line—the descendants of his sister Margaret—from the English succession. He feared Scottish influence and the "Auld Alliance" with France Still holds up..
That said, Catholic Europe did not recognize Henry’s break with Rome, nor his divorce from Catherine of Aragon, nor his subsequent marriages. In the eyes of the Pope and Catholic powers, Elizabeth was illegitimate (the product of Henry’s invalid marriage to Anne Boleyn). Conversely, Mary, Queen of Scots, as the great-granddaughter of Henry VII through a legitimate line (Margaret Tudor), was viewed by Catholics as the rightful heir to the English throne.
This dynastic reality created a permanent state of cold war. As long as Elizabeth remained unmarried and childless—the "Virgin Queen"—Mary stood as the most credible claimant. Every Catholic plot in England, from the Northern Rebellion to the Babington Plot, centered on replacing Elizabeth with her Scottish cousin.
Parallel Lives, Divergent Paths
The cousins never met, a fact that historians often cite as a tragedy of history. Their lives ran on parallel tracks defined by the circumstances of their births Took long enough..
Mary Stuart became Queen of Scotland at just six days old. She spent her formative years in the sophisticated, glittering, and dangerous court of France, married to the Dauphin (later Francis II). She was raised as a Renaissance princess, educated in languages, music, and statecraft, steeped in Catholic culture and the Guise family’s ambition. When she returned to Scotland in 1561 as a young widow, she faced a Protestant Reformation led by John Knox and a nobility prone to factionalism.
Elizabeth Tudor was declared illegitimate at age two after her mother’s execution. She survived the reigns of her half-brother Edward VI and her half-sister Mary I (during which she was imprisoned in the Tower of London). She ascended the throne at 25, a master of political survival, fluent in the art of via media—the middle way. She established the Elizabethan Religious Settlement, creating a Protestant Church of England that retained enough ceremony to appease traditionalists but enough theology to satisfy reformers Not complicated — just consistent..
Their differing upbringings created a clash of queenship styles. Elizabeth, whose legitimacy had been debated by parliaments her whole life, ruled through political calculation, propaganda, and the consent of her counselors. Mary believed in the Divine Right of Kings absolutely; her legitimacy came from God and blood, unassailable by parliament or people. Mary ruled with her heart (and her husbands); Elizabeth ruled with her head.
The Marriage Market: A Diplomatic Dance
For nearly three decades, the question of marriage dominated the relationship between the two courts. Elizabeth used the prospect of marriage as a diplomatic tool, dangling suitors before foreign ambassadors to keep Spain and France in check. She even proposed her own favorite, Robert Dudley, Earl of Leicester, as a husband for Mary in 1563—an extraordinary offer that would have placed a loyal Englishman on the Scottish throne and neutralized the threat Not complicated — just consistent. That's the whole idea..
People argue about this. Here's where I land on it The details matter here..
Mary, however, sought a marriage that would strengthen her claim to England. This move terrified Elizabeth. She rejected Dudley and instead married Henry Stuart, Lord Darnley in 1565. In real terms, darnley was also a descendant of Margaret Tudor (through her second marriage to the Earl of Angus), meaning any child of theirs would have a double claim to the English throne. When Mary gave birth to James VI and I in 1566, the dynastic threat became flesh and blood That's the part that actually makes a difference..
Short version: it depends. Long version — keep reading.
Religion as the Fault Line
While blood connected them, religion divided them irrevocably. The Protestant Reformation split Europe, and the cousins became the figureheads for opposing confessions Most people skip this — try not to..
- Elizabeth was the supreme governor of the Church of England. Her security depended on the Protestant establishment. She faced excommunication by Pope Pius V in 1570 (Regnans in Excelsis), which released her Catholic subjects from allegiance to her.
- Mary was a devout Catholic. She became the beacon of hope for English Catholics (recusants) and the primary agent for foreign Catholic powers (Spain, France, the Papacy) seeking to restore the old faith in England.
Mary’s flight to England in 1568—following her forced abdication in Scotland after the murder of Darnley and her marriage to the Earl of Bothwell—transformed a foreign policy problem into a domestic security nightmare for Elizabeth. Mary became a prisoner-guest in England for 19 years, the living center of every conspiracy.
The Road to Fotheringhay
Elizabeth resisted executing Mary for nearly two decades. On the flip side, she feared the precedent of regicide (killing an anointed queen), the reaction of Catholic Europe, and the loss of a potential deterrent against her own nobles. She famously declared she would not make "windows into men's souls," but the political reality forced her hand.
Worth pausing on this one.
The Babington Plot (1586) provided the smoking gun. Mary’s correspondence, intercepted and decoded by Sir
Francis Walsingham, revealed her explicit consent to the assassination of Elizabeth. The "Bloody Question" had been answered: Mary had crossed the line from dynastic rival to active traitor.
Even then, Elizabeth hesitated. Because of that, she signed the death warrant in February 1587 but claimed her councilors had dispatched it without her final authorization—a calculated ambiguity designed to preserve plausible deniability with James VI of Scotland and the courts of Europe. On February 8, 1587, at Fotheringhay Castle, Mary Stuart met her end with theatrical courage, wearing a red petticoat symbolizing Catholic martyrdom, her final words a prayer for her son and her faith Easy to understand, harder to ignore..
Short version: it depends. Long version — keep reading.
The Irony of Succession
The ultimate irony of their decades-long struggle lay in the succession. But elizabeth, the virgin queen who refused to marry or name an heir to protect her throne, was succeeded by the very son of the queen she executed. James VI of Scotland became James I of England in 1603, uniting the crowns for the first time.
In death, the cousins achieved a unity that eluded them in life. They lie in adjacent splendor in Westminster Abbey: Elizabeth’s effigy serene, holding the orb and scepter of a stable realm; Mary’s tomb, commissioned by her son, grander and more elaborate, bearing the inscription In my end is my beginning Nothing fancy..
Elizabeth had won the battle for survival, securing a Protestant England and a golden age of culture and naval power. But Mary won the dynastic war. The Stuart bloodline—carrying the combined claims of both Margaret Tudor’s marriages—sat on the English throne for the next century And that's really what it comes down to..
Conclusion
The rivalry between Elizabeth I and Mary, Queen of Scots, was never merely personal; it was the collision of two incompatible visions of sovereignty in an age of religious fracture. Elizabeth embodied the pragmatic, masculine-coded reason of state, sacrificing her private self for the public good. Mary embodied the tragic, feminine-coded right of blood, insisting on the divine sanctity of her lineage even as it led her to the scaffold.
History has often forced a choice between them: the shrewd survivor versus the romantic martyr. Yet their true significance lies in their interdependence. Still, each defined herself against the other. Without Mary’s persistent threat, Elizabeth’s regime might never have hardened into the formidable machine that defeated the Armada. Without Elizabeth’s relentless pressure, Mary might have remained a footnote in Scottish factionalism rather than becoming an international icon Simple, but easy to overlook..
Together, they wrote the final chapter of the Tudor-Stuart saga—not with a bang, but with a baptism. When James VI & I rode south to claim his inheritance, he carried the DNA of both queens. The "marriage" they never contracted in life was finally consummated in the person of their shared heir, binding the lion and the thistle into a single, complicated British crown Took long enough..
Quick note before moving on.
