When this site was first made Star Wars consisted of two canonical bodies.* The films and the Expanded Universe (EU). Star Wars has developed a fantastic EU over the years. In these stories Han and Leia got married and had three children. The twins: Jaina and Jacen, and a younger son Anakin Solo.
It was a goal to make a Star Wars Fan Film based off of Kevin J. Anderson's "Heirs of the Force". Because of this I was fascinated by Jacen Solo. So when it came time to register a domain name it was one of the first ideas that came to mind.
With the creation of the Legends category (See footnote below) Jacen Solo is no longer an canon Star Wars character. The case could be made that Kylo Ren is very much a reincarnation of the Jacen character. He is the son of Han and Leia who ultimately fell to the dark side. (In the EU Jacen eventually became Darth Caedus).
*Sadly, a few years ago Lucasfilm relegated virtually all EU material to a place it called "Legends". The Legends material would not be considered canonically accurate in the Star Wars universe. This was done to make room for the stories they wanted to tell in their movie franchises.