Linda Lee
From superman.nu: Supermanica
Linda Lee
Supergirl's secret identity during the Midvale Orphanage years before being adopted by Fred and Edna Danvers and being revealed to the world by Superman.
Her disguise consisted primarily of a brown wig with pig tails. She also used a Linda Lee robot hidden in a hollow tree near the orphanage to take her place when Supergirl was needed (Act No. 252/2, May 1959: "The Supergirl from Krypton!"; and others).
(See also Linda Lee Danvers; Liandly of Earth-2)