Sir William Fraser, KCB (18 February 1816 – 13 March 1898) was a solicitor and notable expert in ancient Scottish history, palaeography, and genealogy.
His mother was the daughter of James Walker, tenant of the farm of Elfhill of Fetteresso, about 5 miles (8.0 km) from Stonehaven.
He became an expert in these fields and published a series of approximately 50 volumes on the histories of between 20 and 30 leading noble and landed families of Scotland.
An article in the Dundee Advertiser on 1 June 1896, stated: "There is no Scotsman living who has so much experience in deciphering ancient documents, nor one who can so skillfully extract information from faded and time-worn parchments" as Sir William Fraser.
The nine-volume book series, The Scots Peerage (1904–1914), by Sir James Balfour Paul, was used for that purpose and is dedicated to him.