One-line: Ganga’s son whose terrible vow saves his father’s marriage and distorts the dynasty.
First appears: Book 2, in Book 2 retelling.
Who they are: Bhishma is the prince who gives up kingship and marriage so his father Shantanu can marry Satyavati. That vow makes him heroic and tragic at once. In the family tree, Bhishma’s renunciation creates the succession problems that later require Vyasa’s intervention.
What they do that matters:
- Is born as Ganga’s son.
- Takes the vow never to marry or claim the throne.
- Becomes the great elder of the Kuru line.
Other names: Gangeya
Family / lineage (when relevant): Son of Shantanu and Ganga.