Twin (Earth-2356)

Twins are two siblings born at the same time from the same parents. Luke Skywalker and Leia Organa were the twin children of Anakin Skywalker and Padmé Amidala. Other twins include Tiplar and Tiplee, two Mikkian Jedi Masters who fought in the Clone Wars, and the Demon Brothers, Gozu and Meizu, two rogue Jedi who worked as bounty hunters during the Separatist Crisis. Technically speaking, a clone is also the twin of his or her template, since the two share the exact same genetic pattern. As such, Boba Fett was both the adopted son and the twin of Jango Fett.

Source

 * https://starwars.fandom.com/wiki/Twin