Dathan

Dathan, also known to the Sith Eternal as "the Abomination," was a human male hybrid strandcast genetically engineered by Sith cultists on the planet Exegol in 12 BBY. The Sith cult utilized the template of Darth Sidious—the Dark Lord of the Sith and Emperor of the Galactic Empire—to create cloned vessels for the preservation of his essence. The strandcast who became known as Dathan was a byproduct of the cult's experiments, however he lacked a strong connection to the Force, despite his genetic connection to Sidious, and thus was deemed a failed experiment by his "father." Although Dathan was treated by Sidious with disdain for his powerless nature—being referred to as a "useless creature"—the excellent health he possessed nevertheless made him permitted to live as a means for continuing the Palpatine bloodline.