An ARISTOCRAT is a member of the highest social class in a society, typically with hereditary titles and privileges. A BARON is a nobleman of high rank, especially one who holds a title of nobility. An EARL is a British nobleman ranking above a viscount and below a marquess. A PEER is a member of the nobility or gentry, especially a British nobleman. Peers are members of the House of Lords, the upper house of the Parliament of the United Kingdom. Nobles are people of high social rank, such as members of the aristocracy. Therefore, a House of Lords Member is a person of NOBLE birth who is a member of the House of Lords, the upper house of the Parliament of the United Kingdom.