Whose lake is the source of the White Nile?

Lake Victoria is traditionally treated as the principal source region of the White Nile, though the Nile’s farthest headwaters extend into smaller rivers feeding the lake. The outflow from Lake Victoria continues northward through Uganda and beyond. This makes the lake central to one of the world’s most famous river systems. The source question is partly geographic and partly historical, because river systems have many tributaries. Lake Victoria’s role in the Nile basin has made it a major focus of mapping and exploration.