Pandava Clan

This occurs in the Book 1 of Mahabharata, in the Sambhava Parva.

Santanu married Ganga, and had a son called Devavrata who was later known as Bhishma. Santanu again got married to Satyavati. Satyavati already had a son called Dwaipayana, before her marriage to Santanu. With Santanu she had 2 sons,  Chitrangada and Vichitravirya. Chitrangada died in a battle with the Gandharvas. Vichitravirya became king after Santanu and married Ambika and Ambalika. Satyavati then asked her son, Dwaipayana to have children through Ambika and Ambalika. Three sons were born -Dhritarashtra,  Pandu, and Vidura. Dhritarashtra had a hundred sons by his wife, Gandhari. Pandu had two wives,Kunti, also called Pritha, and Madri. One day Pandu, while hunting, saw a deer making love to its mate. That was really a Rishi in the form of a deer. Pandu, unknowingly killed the deer. Pierced with the king's arrow, the deer quickly changed its form and became a Rishi, and cursed Pandu, saying he ever tried to make love to any of his wives, he would die.

Kunti through a boon she had received earlier, had from Dharma, Yudhishthira; from Pawana, Bhima; from Indra, Arjuna. Kunti also taught the mantra to Madri who then had twins Nakula and Sahadeva through Aswini Kumars. One day, enticed by Madri, Pandu touched her and fell dead. Madri also died and Kunti brought all the five children.

In Hastinapura, Kunti raised her sons who were always despised by Duryodhana, son of Dhritarashtra.Trying to burn them to death, the Pandavas were sent to Varnavrata, but they escaped from the house of fire. Escaping to the town of Ekachakra, Bhima slew a rakshasha called Vaka. Bhima also slew a Rakshasha called Hidimb and married his sister Hidimba, through whom he had a son, Ghatotkacha.  Later, In Panchala, the Pandavas married Draupadi. Through Draupadi, the Pandavas had five sons. Yudhishthira had Prativindhya; Bhima, Sutasoma; Arjuna, Srutakriti; Nakula, Satanika; and Sahadeva, Srutakarman.

Apart from this, Yudhishthira, married Devika, the daughter of Govasana and had a son named Yaudheya. Bhima married Valandhara, the daughter of the king of Kasi, and had a son named Sarvaga. Arjuna married Ulupi and had Iravan; married Chitrangada and had Babruvahana and married Subhadra and had Abhimanyu. Nakula married Karenumati, the princess of Chedi, and a son named Niramitra. Sahadeva married Vijaya, the daughter of Dyutimat, the king of Madra, and had a son named Suhotra.
Of all the sons, Abhimanyu married Uttara, the daughter of Virata, who had a son, Parikshit. Parikshit married Madravati and had a son, Janamejaya. He married Vapushtama, and had two sons, Satanika and Sankukarna. And Satanika had one son named Aswamedhadatta.

The incidents of Mahabharata are being narrated to Janmajeya, and based on questions being asked. Which is why the genealogy stops with Janmajeya.