I’ve been helping someone out with some advice on Derbyshire gentry as it is a specialism of mine and thought I would add my cribsheet here

Babington, Sacheverell, Curzon, Vernon were all gentry families of the
middle ages and after, who had power bases in Derbyshire – they have been recognised in location names around Derby….

Babington – based near Ashover (they also had a family line in
Chilwell Notts), members of this family fought at Agincourt and
Bosworth, before falling out of favour in the 16th century after
Anthony Babington was involved in the plot that bears his name to
replace Queen Elizabeth I with Mary Queen of Scots, and subsequently
executed. They also owned a town house that stood roughly where
Waterstones is now. Indeed on the building you can the see the family
emblem of a baboon.

Sacheverell – this family were based at Morley Hall on the road to
Heanor. They were a typical gentry family returning Members of
Parliament and Sherrifs of Nottingham. Morley Church has a memorial
brass to Sir John Sacheverell who died at the Battle of Bosworth in
1485. The family line is extinct now but married into the Sitwell
family who are a more recent Derbyshire-related family of note.
(indeed Sitwell Street joins Babington Lane to Sacheverell Street)

Incidentally, the Sitwells (Edith Sitwell, Osbert Sitwell, Sacheverell Sitwell),
from Scarborough, North Yorkshire, were three siblings, who formed a
literary and artistic clique around themselves in London in the period
roughly 1916 to 1930. (You could imagine them visiting Downton Abbey
or being in Upstairs Downstairs)

Vernon – this was one of the major families of the area and their
descendants can still be found at their main home at Haddon Hall. They
were less involved in the national politics and the Wars of the Roses,
but were involved in many local feuds and squabbles.

Curzon – this family have resided at Kedleston Hall since Norman times
and are a fantatsic story in their own right. They have their own
“Hornblower” in Admiral Henry Curzon who rose through the ranks of the
Navy and also commanded HMS Indefatigable, memorably captained by
Derbyshire’s own Robert Lindsey in the TV series. Other notable
Curzons include Lord Curzon, Viceroy of India (after whom the curry
house is named), Nathaniel Curzon who built the current Kedleston Hall
and Sir John Curzon who I portray. He was a retainer of the Duke of
Buckingham amongst others and would have provided him with men for several of the
conflicts of the late fifteenth century.

It’s also a little known fact that Derby once had a castle which it is
believed stood on Cockpitt Hill where the car park of the Westfield
Centre now stands. The sole suggestion of its presence was “Castle
Street” also was lost when the extended Westfield was built over it.