Francis Humphrey Maurice FitzRoy Newdegate, 3rd Viscount Daventry (17 December 1921 – 15 February 2000) succeeded to the title as 3rd Viscount Daventry on the death of his uncle, the 2nd Viscount Daventry in 1986.

He was the son of John Maurice FitzRoy, (brother of Oliver FitzRoy, 2nd Viscount Daventry) who in 1919 married Lucia Charlotte Susan Newdigate Newdegate, heiress of Sir Francis Alexander Newdigate Newdegate of Arbury Hall

Arbury Hall

Arbury Hall is a Grade I listed country house in Nuneaton in Warwickshire, England, and is the ancestral home of the Newdigate family, later the Newdigate-Newdegate and Fitzroy-Newdegate families....

, Warwickshire

Warwickshire

Warwickshire is a landlocked non-metropolitan county in the West Midlands region of England. The county town is Warwick, although the largest town is Nuneaton. The county is famous for being the birthplace of William Shakespeare...

, who took the additional surname of Newdegate and who inherited the Arbury estates on the death of his father-in-law in 1936.

He came into the Arbury estates on the death of his father in 1976.

He was High Sheriff of Warwickshire

High Sheriff of Warwickshire

The High Sheriff is the oldest secular office under the Crown. Formerly the High Sheriff was the principal law enforcement officer in the county but over the centuries most of the responsibilities associated with the post have been transferred elsewhere or are now defunct, so that its functions...

 for 1970 and Lord Lieutenant of Warwickshire

Lord Lieutenant of Warwickshire

This is an incomplete list of people who have served as Lord Lieutenant of Warwickshire. Since 1728, all Lord Lieutenants have also been Custos Rotulorum of Warwickshire.-Lord Lieutenants of Warwickshire:*Ambrose Dudley, 3rd Earl of Warwick 1569–1570*vacant...

 from 1990 to 1996.

He married Rosemary Norrie in 1959 and was succeeded by his son James.