Peerage

A peerage is a legal system historically comprising various hereditary titles (and sometimes non-hereditary titles) in a number of countries, and composed of assorted noble ranks.

Peerages include:

Australia

Peerages in the United Kingdom
Hereditary peer, holders of titles which can be inherited by an heir
Life peer, members of the peerage of the United Kingdom whose titles cannot be inherited
Peerage of England, holders of English titles created before 1707
Peerage of Great Britain, holders of titles created in the Kingdom of Great Britain between 1707 and 1800
Peerage of Ireland, holders of Irish titles created by the Crown before 1920, until 1801 carrying a seat in the Irish House of Lords, some of whom later sat in the House of Lords at Westminster
Peerage of Scotland, holders of Scottish titles created before 1707, some of whom later sat in the House of Lords, all of them having a seat there from 1964 to 1999
Peerage of the United Kingdom, holders of most titles created since 1801 in the United Kingdom of Great Britain and Ireland (renamed United Kingdom of Great Britain and Northern Ireland after 1921)
Representative peers, holders of Scottish and Irish peerages who represented their peer-groups in the House of Lords at Westminster
Welsh peers and baronets, holders of various titles with a Welsh territorial connection
List of dukedoms in the peerages of Britain and Ireland
Jacobite peerage, titles created following the deposition of King James II and VII from the thrones of England, Ireland, and Scotland