Dunkery Hill was part of the "Royal Forest of Exmoor", established by
Henry II according to the late 13th-century
Hundred Rolls. There has been some debate about the origin of the name "Dunkery" and its predecessors "Duncrey" and "Dunnecray".
Eilert Ekwall suggests that it comes from the Welsh
din meaning hillfort and
creic or
creag meaning rock. There are several
Bronze Age burial mounds at or near the summit. Two of the largest are Joaney How and Robin How, which have been damaged over many years, although plans have been made to restore and protect them. "How" comes from the
Norse for burial mound. Joaney How on the northern slope, is more than in diameter. On the southeastern slopes are four more cairns, and there are a further two round cairns and southeast of Rex Stile Head. In addition to the cairns are
barrows, which also date from the Bronze Age. One
bowl barrow on the southeastern spur of the
Chains is in diameter. A circular funerary stone mound north of Dunkery Bridge, which is a walk from the summit, dates from the
Neolithic or
Bronze Age. It is approximately high and in diameter. plaque on the summit
Sweetworthy, on Dunkery Hill's north-facing slope, is the site of two
Iron Age hillforts or enclosures; one has a single rampart and external ditch, enclosing . The rampart is still visible, and the ditch on the east side is used as a trackway. There was a defended settlement above the main site. It is also the site of a deserted medieval settlement, which has been designated a
scheduled monument. It has been added to the
Heritage at Risk Register because of the vulnerability to plant growth. In 1918 Sir
Thomas Acland granted to the National Trust a 500-year lease of a large part of the
Holnicote Estate, including Dunkery Hill. Dunkery Hill was put up for sale in 1928.
Labour Party activist and
Member of Parliament Margaret Bondfield asked in the
House of Commons if the government was willing to have it designated an ancient monument, to preserve it for future generations. She received the reply that although the government was agreeable to having the hill listed there were no funds available for its purchase; the beacon and surrounding mounds were subsequently designated an ancient monument. The beacon itself, and of surrounding land, was donated in 1932 by Colonel W.W. Wiggin. A further of nearby land was donated in 1934 by Mrs Hughes in memory of her husband Alan Hughes of Lynch Allerford, Minehead. ==Ecology==