Sir Andrew Windsor, 1st Baron Windsor (Wyndsore, Wyndesor) (1467–1543) was an English peer, M.P. and Keeper of the Wardrobe, knight banneret and military commander.
In manuscript and printed sources dated before 1650 his name consistently appears as 'Andrew' or 'Andrewe'. In 1676 Sir William Dugdale (1605–1686) gave an account of him in The Baronage of England, partly based on information from 'Thomas, late Lord Windsor deceased' (6th Lord Windsor, died 1642), in which he is called 'Andrews' Windsor, Andrews having been the maiden name of Sir Andrew's mother. Arthur Collins gave the account that the 6th Lord, dying without issue, in 1641 settled his estate upon his intended heir, his sister's son Thomas-Windsor Hickman (then in his minority), on condition that he assume the name and arms of the Windsor family. The title was restored in him (in fulfilment of a warrant instigated by King Charles I) by King Charles II in 1660, as the 7th Lord Windsor. In spirited compliance with his late uncle's intention, he reshaped his name to Windsor-Hickman, and chose ancestral names for his own children, naming one 'Other' after the Domesday ancestor, and another (in 1678) Andrews Windsor. This appears to be the origin of the revision in the 1st Baron's name made by Dugdale.
The 7th Lord Windsor was advanced to the dignity of 1st Earl of Plymouth by Letters Patent in 1682. Several very learned authors, notably Arthur Collins, Daniel Lysons and Sir Harris Nicolas, perhaps of courtesy, followed Dugdale's indication (if it was not simply a misprint, since he uses both forms) and went so far as to alter the form 'Andrewe' (in manuscript sources) to 'Andrews' in their printed transcripts of the same documents referring to the 1st Baron Windsor. Others, notably John Burke, resisted the alteration, resulting in two separate nomenclature traditions. In modern usage in historical contexts, the 1st Baron Windsor is referred to as Sir Andrew, the name used during his own lifetime.