List of courtesy titles in the peerages of Britain and Ireland

Columns: Peer | Son | Grandson | Great-grandson
The Duke of Devonshire | Marquess of Hartington | Earl of Burlington * | Lord Cavendish* | The Duke of Marlborough | Marquess of Blandford* | Earl of Sunderland | Lord Churchill | The Duke of Rutland | Marquess of Granby* | Lord Haddon | The Duke of Hamilton and Brandon | Marquess of Douglas and Clydesdale* | Earl of Angus | Lord Abernethy | The Duke of Buccleuch and Queensberry | Earl of Dalkeith* | Lord Eskdaill | The Duke of Argyll | Marquess of Lorne* | Earl of Campbell | Viscount Lochaw | The Duke of Atholl | Marquess of Tullibardine* | Earl of Strathtay | Viscount Balquhidder

Example questions:
What is the seat of the peer in the peerages of Britain and Ireland whose son holds the oldest extant title in English peerage ? | Who is the grandfather of the man with the title in the peerages of Britain and Ireland created in 1664 ? | Who created the title in the peerages of Britain and Ireland of the peer whose grandson is Viscount Ipswich ? | Who was the first person to hold the title in the peerages of Britain and Ireland of the peer whose great grandson is Viscount Dundaff ? | How many times has the title in the peerages of Britain and Ireland of the peer whose grandson is Lord Howland been created ?

Answers:
Arundel Castle | Duke of Devonshire | Charles II | David Lindsay | Six