When researching family history, you sometimes come across surprises that make you stop and double-check the records. One such moment came when I realized that a couple in my family tree—John Lee (1805–1853) and Margaret Maddocks (1804–1883)—were not just husband and wife, but also first cousins. This discovery was one of those classic genealogy research surprises that make you rethink everything you thought you knew.
At first, I questioned the accuracy of the documents. But the baptism records, census entries, and shared surnames within a small rural community all confirmed the relationship. John and Margaret had the same set of grandparents—John Maddocks and Martha née Hughes—making them first cousins by blood. Margaret’s father was Randle Maddocks, and John’s mother was Randle’s sister, Mary Maddocks.
Family Tree Diagram
To help visualize the connection, here’s a simplified family tree showing how John Lee and Margaret Maddocks were related:
┌────────────────────┐
│ John Maddocks │
│ married │
│ Martha Hughes │
└─────────┬──────────┘
children
┌─────────────────┴─────────────────┐
│ │
┌─────────────────────┐ ┌───────────────────┐
│ Randle Maddocks │ │ Mary Maddocks │
│ married │ │ married │
│ Margaret Hopley │ │ Thomas Lee │
└──────────┬──────────┘ └─────────┬─────────┘
daughter son
┌────────┴─────────┐ ┌────────┴────────┐
│ Margaret │ │ John Lee │
│ Maddocks │ │ (1805–1853) │
│ (1804–1883) │ │ │
└──────────┬───────┘ └──────────┬──────┘
└─────────── Marriage ─────────────┘
As the diagram shows, Randle and Mary were siblings—children of John Maddocks and Martha Hughes. Their respective children, Margaret and John, later married. This is a textbook example of cousin marriage in England during the 19th century, especially in farming villages where rural community marriage customs meant potential spouses often came from the extended family.
Yes, first cousin marriage was—and still is—legal in England and Wales. Although it has often been viewed with suspicion or disapproval in various cultures and time periods, English law has never prohibited first cousins from marrying. The Anglican Church marriage rules also permitted it, and in the 1800s, it was not unusual to find it in parish registers.
From the perspective of English marriage laws in the 1800s, there was no obstacle. In fact, cousin marriages were relatively common in rural areas, where social circles were small. The legal status of cousin marriage in the UK has remained unchanged for centuries, despite occasional debates about the genetic effects of cousin marriage.
The taboo around cousin marriage grew stronger in the late 19th and early 20th centuries, especially after the rise of genetics as a scientific field, but in John and Margaret’s time, such a union was not only legal but largely unremarkable. This is a notable detail for anyone studying the history of cousin marriage in the UK or first cousin marriage history in general.
From a genealogical point of view, cousin marriages like John and Margaret’s cause what is known as pedigree collapse.
Normally, each generation back in a family tree doubles the number of ancestors: two parents, four grandparents, eight great-grandparents, and so on. But when cousins marry, they share some of the same ancestors. So instead of having eight distinct great-grandparents, their children might have only six or even fewer. The family tree collapse means the same individuals appear more than once in the ancestry chart.
In genealogy, pedigree collapse definition refers to this overlap of ancestors. It becomes especially noticeable the farther back you go, and if cousin marriages happened more than once in a lineage, it can significantly reduce the number of unique individuals. This can also complicate DNA results—cousin marriage and DNA testing often produce more complex relationships than expected.
Learning that John Lee and Margaret Maddocks were first cousins doesn’t change who they were—it simply adds another layer of understanding. It sheds light on their community, their family’s social dynamics, and the practical realities of life in the 19th century. It also helps explain patterns in John Lee family history and Margaret Maddocks family history, as well as how pedigree collapse genealogy can shape our modern understanding of the past.
It’s a reminder that the past is rarely simple—and that family history often leads us into unexpected territory.
Linda EYE on the PAST
Related Reading: The Cousin Marriage of Emma Boliver & Thomas Boliver – discover another branch of the family tree where cousins tied the knot.
[…] Reading: First Cousins and Pedigree Collapse – John Lee & Margaret Maddocks – explore another intriguing example of cousin marriage in our family […]