Welcome to the forum.
"Ruger" is a gun manufacturer.
"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.
Besides, it is fun to get out to the range!