What is the name of a major Russian river starting with L?

There are six rivers in Russia that begin with the letter L. You could make that number up to 7 by including the Lower Tunguska. They are as follows,

Laba,

Lama,

Lava also known as the Lyna,

Lena,

Lovat,

Lower Tunguska,

Luga.

The Major river of the list above would be the Lena, as it is the 10th longest in the world.