Tommy Tomorrow
From superman.nu: Supermanica
Tommy Tomorrow
The Twenty-First Century scientific inventor and leader of the Planeteers (first appearance: Real Fact Comics No. 6, Jan/Feb 1947: "Columbus of Space").
Supergirl meets the young Tommy Tomorrow when she journeys to the future and visits an interplanetary orphanage. Tommy unwittingly saves the Maid of Might from kryptonite with one of his inventions and Supergirl returns the favor by saving his adoptive parents (Act No. 255/2, Aug 1959: "Supergirl Visits the 21st Century!").