Algernon Percy, 6th Duke of Northumberland was his elder brother and Lord Henry Percy his younger brother.
After his father succeeded in the dukedom of Northumberland in 1865 he was styled Lord Josceline Percy.
[citation needed] He was educated at Eton and St John's College, Cambridge, graduating MA in 1833.
[citation needed] Percy married Margaret, daughter of Sir David Davidson and widow of Sir Robert Grant, in 1848.
This article about a Conservative Member of the Parliament of the United Kingdom representing an English constituency and born in the 1810s is a stub.