Guess My Nickname?

Origin for nicknames. Have you ever wonder why Peggy is a nickname for Margaret and Bill for William? There is an explanation on how the nicknames started. I have seen a more detailed site with more deep explanation, unfortunately I cannot find that site. I still hope to find that site. There was a really good information. But Wikipedia has part of the explanation that I was looking for under "Nicknames for People" The most unusual nickname that I find amusing is "Dick".... Even famous actors use it. The first two links below explain the origin of the nickname.

Onpedia
http://www.onpedia.com/encyclopedia/nickname

Wikipedia
http://en.wikipedia.org/wiki/Nickname

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Here are a few out of many lists around the web.

The White House Presidential Nicknames!
http://whitehouse.georgewbush.org/kids/nicknames.asp

US List Of Presidential Nicknames
http://knowledgerush.com/kr/encyclopedia/List_of_U.S._Presidential_Nicknames

List of Baseball Nicknames
http://wapedia.mobi/en/List_of_baseball_nicknames

List of U.S. State Nicknames
http://www.bambooweb.com/articles/l/i/List_of_U.S._state_nicknames.html

Slang, Jargon, and Nicknames for Crystal Meth / Methamphetamine
http://www.kci.org/meth_info/slang_names.htm

Soccerfile
http://www.soccerphile.com/soccerphile/news/nicknames2.html

Criminal Nicknames
http://www.factacular.com/subjects/Criminal_Nicknames

NFL Names
http://en.wikipedia.org/wiki/List_of_NFL_nicknames

Football Mascots
http://www.footballbabble.com/football/nfl/mascots