Wikipedia
Shishupala
Shishupala (, lit. protector of child, IAST: Śiśupāla; sometimes spelt Sisupala) was the son of Damaghosh, king of Chedi, by Srutadev, sister of Vasudeva. Therefore, he was not only cousin of Krishna, but also Krishna's implacable foe because Krishna had carried off Rukmini, his intended wife. He was slain by Krishna at the great sacrifice of Yudhishthira in punishment of opprobrious abuse. He was also called Chaidya.