Ḥalfon ha-Levi ben Manasseh (Abū Saʿid Ḥalfon ha-Levi ben Manasseh Ibn al-Qaṭāʾif) was the most important and prominent rabbinical court clerk (Heb. sofer bet din) in Fustat during the first half of the twelfth century. The Cairo Geniza contains numerous documents and letters in his handwriting and bearing his signature, dating from the years 1100 to 1138. These include at least 255 acts of the rabbinical court recorded in his hand and preserved in full or in fragmentary form, but it is likely that the total number of …