The name "Senerchia" is derived from "Sena Herclae," which means "Bosom of Hercules" in archaic Latin. The etymology of the word and the castle ruins may indicate that Senerchia was once strong and powerful. Some also say that[who?], the name recalls the local Northern Tuscan names silerchia and silerchie which presuppose a "silercula" from the Latin Siler-eris, meaning a plant that grows in places full of water.