This article is about the brother of Emperor Alexios I Komnenos. For the son of Alexios, see Isaac Komnenos (son of Alexios I).

Isaac Komnenos
Historical Figure
Nationality: Greek citizen of the Byzantine Empire
Date of Birth: c. 1050
Date of Death: 1102 or 1104
Cause of Death: Unknown
Religion: Eastern Orthodox
Occupation: Soldier
Parents: John Komnenos,
Anna Dalassene
Spouse: Irene of Alania
Children: Eight
Relatives: Alexios I Komnenos (brother),
Komnenoi family
House: Komnenos
Political Office(s): Sebastokrator
Fictional Appearances:
Shared Universe Story
"Two Thieves"
Type of Appearance: Direct
Nationality: New Constantinople

Isaac Komnenos (c. 1050 to 1102/1104) was a Byzantine general. He was the older brother of emperor Alexios I Komnenos, and remained one of Alexios's enthusiastic supporters. Alexios created the title of sebastokrator to reward Isaac for his loyalty, an office that was nearly equal to that of the emperor.

Isaac Komnenos in "Two Thieves"[]

Like everyone who lived and died on planet Earth, Isaac Komnenos was resurrected after his death with a physical age of 25 on Riverworld. He became right-hand man of his brother, Alexios, the Basileus of New Constantinople.[1] Isaac held the office of kaisar.

Isaac supported his brother's plan to forge an alliance between New Constantinople and Shytown against their mutual enemy, Bornu. He participated in the final battle against Bornu, and was among those who helped slay Bornu's ruler, Musa ar-Rahman.[2] He also willingly left his position of kaisar to allow Shytown's mayor, Richard J. Daley, to take the office. However, Alexios immediately appointed Isaac to the position of Sebastokrator, the office Isaac held on Earth, leaving the office of kaisar worthless.[3]


  1. Tales of Riverworld, pg. 173.
  2. Ibid., pgs. 191-199.
  3. Ibid., pgs. 204-206.