The Victoria Nile, also known as the White Nile, one of the two main arms of the Nile, flows from Lake Victoria.

An excerpt from the article 32 facts about Uganda

The White Nile and the Blue Nile (the longest and most water-rich tributary of the Nile) join near Khartoum.

The first European to see the lake in 1858 was John Speke. He named it Lake Victoria in honor of Queen Victoria.