Superman #140

Bizarro-Lois gives birth to Bizarro-Jr. No. 1 who, while he thinks like a Bizarro looks like Superman when he was Super-Tot. When B-Jr. No. 1 becomes publicly known, Bizarro takes him out into space and stores him in an abandoned space capsule. The capsule crashes on Earth and Bizarro-Jr. No 1 is taken to the same Midvale Orphanage where Linda Lee (Supergirl) lives.