When it comes to photography, alliances are formed to pair one photo company with another.
One of these partnerships is Panasonic's Lumix partnering up with the famous Leica lenses. You can do a search for "Leica" at the Lumix site:
And, one of the current cameras offered is the Lumix LX5:
So, you get a "Leica-branded" lens on a Lumix camera. Now, this camera is by what I can tell identical to the Leica version, the D-LUX 5:
Other companies like Sony cameras do this with Zeiss lenses and Kodak cameras with Schneider lenses.