This amulet represents Pataikos, a popular protective deity, amulets of whom were believed to ward off threats to the wearer. He is usually depicted as a nude dwarf with a bald head, often wielding a pair of knives. This example is made of faience with a dark blue glaze.
From Giza: Street 7000 opposite Ave I. [Excav. date] Nov. 25, 1924 / Photo B 5797. Excavated by the Harvard University–Museum of Fine Arts Expedition; assigned to the MFA by the government of Egypt.
Harvard University—Boston Museum of Fine Arts Expedition