Liam Tra'kelv is a descendant of Fell Skyhawk, aka Cody Shan, and Jaina Solo Skyhawk. After Fell and his children were lost Jaina, who had not been able to inform anyone of their marriage because of poor communication ability in the nebula she had been stranded in, kept her last name as solely Solo. Fell's children grew up, had kids, who had kids, who begot Liam eventually.
Born Mandalorian who was taught the ways of the at this time dead Mandalorian Jedi Order, Liam lived in the unknown regions. Then the Sith came and invaded his home. He fled and joined the Jedi Order proper. However because of his young age and his emotional state he was placed in as an apprentice, despite his great skill and knowledge of the Force. He was content with this as long as he was put to good use.
Accompanying him is his trusty droid L-3GO, or Lego.
His sister, Jaina Tra'kelv, was named after their ancestor, and is believed long dead. She however became a Jedi knight, and is again believed dead. Whether she is or not is yet to be seen. She carries the lightsaber of her namesake.
Their mother, Kara'ika Ordo Tra'kelv, was killed by Sith forces... or so he saw... we shall see if she is indeed dead.
Quoting General Grayfox5
Um... Just a reminder, Jaina Solo married Jagged Fel..... I think you might have gotten it mixed up... Wait! mesa sorry.... this is 20,000 years after that. :P
Yes, but the Jaina Solo referred to here is that Jaina Solo. You know this is fan fiction, and there are a good number of 5 consecutive years of Jaina Solo's life unaccounted for well before her marriage. And I wrote her marrying Cody Shan in well before Jagged married her, before even the NJO series was finished being released. So I reconed it, then when they changed things again reconed again... just like the professional SW writers do. Now Cody Shan, youngest grandson of Revan, marries Jaina Solo's clone. (Originally he was grandson to both Revan/Bastilla and Exile/whoever mixes and went by the name Fell Skyhawk. Then cause of Jagged Fel and my own series of sci-fi I renamed the name Cody went by as Kian Tra'Kelv) Long long story.