Titles in the World: Ordinary, Nobile, Royal

Titles: Mr, Mrs, Miss, Ms, Dr, Earl, Father, Lady, Lord, Professor, Reverend, Sir, Viscount

Peerage Basics
“Duke, Marquess (or, in the French and Scottish spelling, Marquis), Earl, Viscount, Baron”
http://www.chinet.com/~laura/html/titles02.html

Peerage
http://en.wikipedia.org/wiki/Peerage
List of elected hereditary peers under the House of Lords Act 1999
http://en.wikipedia.org/wiki/List_of_elected_hereditary_peers_under_the_House_of_Lords_Act_1999

Royal and noble ranks
http://en.wikipedia.org/wiki/Royal_and_noble_ranks

Offices in the Polish–Lithuanian Commonwealth
http://en.wikipedia.org/wiki/Offices_in_Polish-Lithuanian_Commonwealth

Russian Nobility
http://en.wikipedia.org/wiki/Russian_nobility

Chinese Nobility
http://en.wikipedia.org/wiki/Chinese_nobility

List of family trees
http://en.wikipedia.org/wiki/List_of_family_trees