Simha of Speyer

Simḥa ben Samuel of Speyer was a German rabbi and tosafist. Neither the year of his birth nor that of his death is known. He was one of the leading signatories of the Takkanot Shum He was a nephew of the director Kalonymus, a student of R. Eliezer of Metz, and a colleague of Eliezer ben Joel ha-Levi.
Simha was the author of the following works:

Commentary on the treatise Horayot
Tosafot and novellæ on the Talmud;Seder Olam, a work divided into paragraphs and containing decisions, comments on Talmudic passages, and regulations for religious practice. All the responsa and decisions which the earlier authors quote in the name of R. Simḥah were probably taken from this work.Tikkun Shetarot, on agreements and documents
Sections on the laws of blessings

Aside from these works decisions and responsa by Simḥah are mentioned in the responsa collection of R. Meir of Rothenburg and in the works of several older authors.