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.
He is regarded as the ancestor of the noble House of Grey, branches of which held many peerage and other titles in England, including Baron Grey de Wilton (1295), Baron Ferrers of Groby (1299), Baron Grey of Codnor (1299, 1397), Baron Grey de Ruthyn (1324), 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 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), Baronet Grey of Fallodon (1814), etc., which married into the royal family and which continues to this day. Lady Jane Grey (c. 1537 – 1554) "the Nine Days' Queen", was a member of this family.