Shadows of Impiltur
Frederick is the eldest son of Thomas Theil of Lyrabar. While his father is in a jail in New Sarshel, Frederick is responsible for running the massive mining business. It is said that Frederick got all the brains in the Theil family and is a natural with managing gold and making sure he can find it if the company needs to expand. He is married to Selma, the one daughter of Behroun of New Sarshel.