"Luger" is a type of pistol named after designer Georg Luger. The 9mm Luger round (also known by other names) was designed for it in 1902. It's a most popular round, and used widely today in a number of pistols.
Please consider taking a NRA Basic Pistol class with your spouse. You'll learn safety, and likely have an instructor that can help you shoot more accurately, and enjoy your new purchase more.