Jeremy Poldark is the second child born to the central characters Ross and Demelza Poldark in Winston Graham's historical novel series. His life and experiences are detailed in the later books of the series, where he develops interests beyond the family's traditional mining endeavors, showing a fascination with early automotive technology. His romantic life is marked by unrequited love for a noblewoman, Cuby Trevanion, who initially rejects him due to social expectations but eventually reciprocates his feelings.

Their relationship culminates in a shared flight to France, where Jeremy enlists in the army. Tragically, he dies in battle at Waterloo, leaving his pregnant wife, Cuby, devastated. Jeremy's story represents a continuation of the Poldark family saga, exploring themes of love, societal pressures, and the impact of historical events on individual lives.

Jeremy Poldark is the second of five children born to Ross and Demelza Poldark. His siblings include Julia, Clowance, Isabella-Rose (Bella), and Henry (Harry). Growing up within the Poldark family, Jeremy would have been exposed to the ongoing dramas and challenges faced by his parents and the wider community in Cornwall. As the series progresses into the 19th century, Jeremy's own life and character begin to take shape, distinguishing him from his siblings.

In the later installments of the Poldark series, Jeremy Poldark develops distinct interests that set him apart. He shows a significant engagement with his father's mining enterprises, indicating a potential continuation of the family's legacy in that area. Concurrently, he exhibits a forward-looking fascination with emerging technologies, specifically early forms of automobiles. His romantic life is a significant plot point, as he falls for Cuby Trevanion, a young noblewoman. Despite her initial rejections, influenced by societal expectations and family pressures to marry someone of higher social standing, Cuby eventually realizes her true feelings for Jeremy.

The relationship between Jeremy and Cuby culminates in their elopement and move to France. It is there that Jeremy joins the army, ultimately meeting his death in the conflict at Waterloo. This event leaves Cuby, who is pregnant with their child, profoundly grief-stricken and widowed. Jeremy's death serves as a poignant element in the Poldark narrative, highlighting the personal costs of historical conflicts and the enduring impact of loss on the surviving characters. His story concludes with the continuation of his lineage through his unborn child.