[citation needed] The Dukes of Beaufort descend in the male line from the House of Plantagenet through John of Gaunt, son of Edward III.

The instance of false paternity could have occurred anywhere in the numerous generations separating Richard III from the 5th Duke of Beaufort.

The Earldom of Glamorgan and Viscountcy of Grosmont derive from an irregular creation in 1644 by Charles I in favour of Edward Somerset, who later succeeded his father as 2nd Marquess of Worcester.

Although the Earldom of Glamorgan and Viscountcy of Grosmont were not recognised as substantive titles at the restoration of Charles II, because of irregularities in the patent of creation, they have nevertheless continued to be used as convenient courtesy titles in order to distinguish the bearer from the Marquess of Worcester as heir apparent, the Earldom of Worcester not being distinctive enough for this purpose.

The family seat was once Raglan Castle in Monmouthshire, but as of 2017[update] was Badminton House near Chipping Sodbury in Gloucestershire.

The principal burial place of the Dukes and Duchesses of Beaufort is St Michael and All Angels' Church, Badminton.