There is a ruler in history called “Charles the Fat“.  I just happened across his name on a website.  He was the King of Alemannia, King of Italy, Holy Roman Emperor, and more, back in the 9th century.

He was usually considered lethargic and inept.  The article doesn’t say why his name is such, although I could make a guess…  🙂

On a related note, it seems like people don’t have nicknames like that anymore…