The name is Old English: the homestead or village of the people of Hroc, or Hroca. The settlement sits in a gap in the limestone uplands where the River Welland has carved a broad valley between Northamptonshire to the south and Leicestershire and Rutland to the north. That geography mattered. Whoever held the high ground at Rockingham could control the route between the Midlands and the east of England, and the Normans understood this immediately. William the Conqueror ordered a motte-and-bailey castle built on the bluff above the village shortly after 1066. His sons used it. The castle is still there, still occupied as a family home by descendants of the Watsons who bought it from Henry VIII in the sixteenth century, and still open to the public on certain days. The view from its battlements across five counties is one of the great panoramas of England, and one of the reasons the Normans chose this spot in the first place.

Rockingham Forest covered most of northern Northamptonshire from the Norman period until the seventeenth century, a royal hunting preserve named for the village at its centre. Forest in this medieval sense did not necessarily mean a continuous canopy of trees; it meant land subject to forest law, where the king's deer were protected and the peasantry's right to take wood and game was severely restricted. The forest sustained generations of royal hunts, supplied timber for the Royal Navy, and shaped settlement patterns across a wide region. Sections of it survive today as ancient woodland: Fineshade, Westhay, and the woods around Wakerley and King's Cliffe. The forest's reach made Rockingham, a village of barely a hundred people now and probably never much larger, the namesake of an enormous tract of land that long outlived the kings who hunted in it.

The Marquess of Rockingham was a peerage that ran out in 1782 when Charles Watson-Wentworth, the second marquess, died without an heir three months into his second term as Prime Minister of Great Britain. He had recognised American independence and abolished some of the most corrupt features of Hanoverian patronage; another few years and the history of the British constitution might have looked rather different. The title died with him, but the name kept turning up in unexpected places. Rockingham Primary School is in Corby, the nearest town. Rockingham Motor Speedway, once Europe's premier banked oval circuit, ran races outside Corby until 2018 before being redeveloped for industry. The A6003 still runs north-south through the village itself, climbing out of the Welland valley toward the high ground, and most who drive it do not notice that they have just passed through one of England's smaller and more historically charged places.

Rockingham today is a single street of stone cottages, the castle entrance, and a handful of farms. The 2011 census recorded 113 residents, down from 115 a decade earlier. Many English villages have ballooned over the past century into commuter dormitories or holiday-let portfolios. Rockingham mostly has not. The slope is steep, the buildings are listed and protected, the castle dominates the land available for development, and the result is a place that looks much as it might have looked in the eighteenth century, only with electricity and broadband. The nearby villages of Cottingham, Great Easton, and Caldecott sit close by across the county lines, all of them within a few minutes' drive. Stand on the village street, look up at the castle, and look down at the Welland threading through its valley below, and you can see why William II thought this was the place to settle his quarrel with the church. He lost the argument. The view from the hill is still worth the climb.