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.
From Giza: G 7510 Z. 1925: excavated by the Harvard University–Boston Museum of Fine Arts Expedition; assigned to the MFA in the division of finds by the government of Egypt.
Harvard University—Boston Museum of Fine Arts Expedition