Anchetil de Greye (c. 1046 – after 1086) was a Norman chevalier and vassal of William FitzOsbern, 1st Earl of Hereford, one of the great magnates of early Norman England, and one of the very few proven companions of William the Conqueror known to have fought at the Battle of Hastings in 1066.
He is regarded as the ancestor of the noble House of Grey, which has attained a range of titles in England, including Queen of England, Queen of Ireland, Earl of Tankerville (1419, 1695), Earl of Huntingdon (1471), Marquess of Dorset (1475), Baron Grey of Powis (1482), Duke of Suffolk (1551), Baronet Grey of Chillingham (1619); Baron Grey de Wilton (1295), Baron Ferrers of Groby (1299), Baron Grey of Codnor (1299, 1397), Baron Grey de Ruthyn (1324), Baron Grey of Werke (1623/4), Earl of Stamford (1628), Viscount Glendale (1695), Baronet Grey of Howick (1746), Baron Walsingham (1780), Baron Grey of Howick (1801); Viscount Howick (1806), Earl Grey (1806) and Baronet Grey of Fallodon (1814).