Ghebb Dellos was a Sebacean male and the husband of Rylani Jeema Dellos. One of only two surviving Sebecean colonists, he was killed by an unnamed Scarran while defending his wife and their transport pod. Many cycles before John Crichton's arrival in the Uncharted Territories, Ghebb and Rylani were aboard a Leviathan of Sebacean pioneers with plans to start a colony on the planet Motak IV in the Uncharted Territories. Outside of the protection of Peacekeepers, the ship was attacked by Scarrans. Everyone aboard was killed except for Rylani and Ghebb who managed to escape on a transport pod.