Analysis of information sources in references of the Wikipedia article "Jian of Qi" in English language version.
項羽起，封建孫安為濟北王。至漢興，安失國，齊人謂之「王家」，因以為氏。[Xiang Yu rose in power, granting An, grandson of Jian, the king (of Qi) as the vassal king of Jibei. Han was established, An's vassalage was taken, [his] was called Wang family, [his] descendants took it as surname.]
