Uddhava calls the line upheld in Uttara by Abhimanyu the line of Puru; it was cut off by the weapon of Drauni and upheld again by the Lord: 'uttarAyAM dhR^itaH pUroH vaMshaH sAdhu abhimanyunA' (SB 3.3.17).
King
Puru
पुरु
Puru is the ancestor king after whom Uddhava names the line upheld in Uttara by Abhimanyu. SB 3.3.17: 'uttarAyAM dhR^itaH pUroH vaMshaH sAdhu abhimanyunA / sa vai drauNyastra-sa~nChChhinnaH punar bhagavatA dhR^itaH' — the line of Puru was cut off by the weapon of Drauni, the son of Drona, and was upheld again by the Lord.
Śrīmad Bhāgavata Mahāpurāṇa 3.3.17 — Sanskrit Wikisource (pinned chapter page; Devanagari from the cross-validated transcription in validation/sanskrit_skandha3.json)
Ancestor of the line upheld by Abhimanyu