The Agamemnon is from greek history although I think the names been used for a couple of ships over the years.
The IKS Remora got its name because I was trying to think of a name quickly and got stuck with the name of that ship from DS9, the Rotaran, in my head. Remora's are a type of fish which typically live around sharks.
USS VISITOR (jay, sounds lame), 3 Ships to letter B, because we had a Star Trek Mail RPG when I was 14 or so when my char started developing. So I stick with it. Think my T2 ship will get this name, since you can only have each name once for a ship of yours.
Other one could be USS Saratoga from Space Above And Beyond
Named after a famous (for me it is famous) aircraft carrier of the United States Navy in World War 2, being the Flagship of Rear Admiral Frank Jack Fletcher.
The USS Yorktown was s sister-ship of the USS Enterprise and participated in may important engagements in the pacific theatre (including one of the most famous: battle if midway) and was sunk by a japanese submarine (u-boat) on June 6th 1942.