Stellar Surnamed Superheroes: Starman

Thom Kallor was the son of astronomers traveling through space where their son was born. As such, he gained the ability to increase mass and density in order to increase the gravitational pull of an object. When he was 16 years old, Thom left his home behind and encountered a comet which temporarily gave him Kryptonian level powers as well. Joining the Legion of Super-Heroes as Star Boy, he would travel from his native 30th century to the 20th century where he met Earth-One's Supeeboy, his future fellow Legionnaire. Kallor eventually met and fell in love with another Legionnaire, Nura Nal aka Dream Girl. Throughout the years, the pair would be foundation members of the Legion through its various incarnations.

Theodore Knight was the wealthy heir to a fortune who had a hobby as an amateur astronomer. When his cousin Sandra discovered untapped inventions of her scientific friend Professor Abraham Davis, she introduced one of these to Ted in the form of the gravity rod which he was able to energized with cosmic radiation he tapped from his observatory. He became Starman and soon thereafter a member of Earth-Two's Justice Society of America. With that team, he journeyed to the 30th century in order to obtain the needed items for a bomb defense formula. Encountering that era's Defenders, he along with his fellow Socialites succeeded and returned to the 20th century.

Eventually, Ted married a woman named Adele Doris Drew and sired a son named David...and later a younger son in Jack. Years later, this Doris... different from Ted's early girlfriend named Doris Lee who had briefly adopted a Starwoman alter ego to aid her boyfriend and his Justice Society allies... died leaving her husband a widower. During this period, Ted would attempt to raise both of his sons however given his scientific nature he would often find that he had a disconnect with both of them. While David aspired to be like his father, Jack wanted to chart his own course in life. 

As for Thom and Nura, for a brief period of time Kallor was expelled from that team while defending Dream Girl from a jealous romantic rival. She left with Star Boy and together they were members of the Legion of Substitute Heroes. Eventually they would be readmitted into their original team. In their later years as Starman and Dream Woman the pair would ultimately marry in one alternate future.