From the Latinized form Nigellus, derived from 'niger' meaning dark or black-haired.
Nigel has one of English nomenclature's more convoluted origin stories. It emerged in medieval England as a Latinized form — *Nigellus* — of the Old Norse name *Njáll* or the Old Irish *Niall*, which most scholars trace to a Proto-Celtic root meaning "champion" or possibly "passionate" or "vehement." Paradoxically, medieval scribes sometimes connected it to the Latin *niger* (black), which influenced some spellings and contributed to the name's slightly ambiguous etymology.
Whatever its root, it became established in Norman and Anglo-Saxon England, producing a long trail of Nigels through the medieval period. Nigel reached its cultural apex in mid-twentieth-century Britain, where it became almost archetypal of a certain class of English masculinity — cerebral, slightly eccentric, reliably decent. It was the name of scientists, cricketers, and conservative politicians.
Nigel Molesworth, the hapless schoolboy narrator of Geoffrey Willans's beloved comic novels of the 1950s, made the name synonymous with a particular charming bumbling Englishness. More recently, Nigel Farage gave the name sharper political contours in Britain. In America, Nigel always carried an air of Anglophile sophistication, the name of a clever side character in a film who inevitably steals scenes. In the twenty-first century it has dipped in British birth registers but maintained devoted admirers who prize its Shakespearean-adjacent sound and distinguished restraint.