Guo Shu is regarded by Guo's clan as their primogenitor. Mori also paid respects to his ancestor, the primogenitor of the Mori clan, Mori Katsunobu. Chao Phraya Akkaramahasaena was the primogenitor of the House of Bunnag. According to Al-Suyuti, Samum is the primogenitor of spirits. This amended an older theory that Raymond FitzGerald (died 1185/1198) was the primogenitor.