Superman: Mon-El - Man of Valor #1

Using crystals, Mon-El finds out Daxam's history started with a colonist from Krypton named Dax-Am. Much later a traveler from Daxam came to Earth, fell in love, but returned to Daxam carrying a child. Years passed, and many on Daxam started to fear the stars, but Lar Gand and his friend Van found the long-ago traveler's craft still working. When they were betrayed to the authorities, Lar was forced to flee alone in the rocket. The ship, still programmed for a course to Earth, brought Lar to the Kent farm. Mon-El now realizes the pregnant traveler was his ancestor and he has Earth blood.