Noun
serekh (plural serekhs)
In Egyptian hieroglyphs, a rectangular enclosure consisting of a depiction of a palace façade and a top-down view of a royal courtyard containing the Horus name of a pharaoh, usually topped by a Horus falcon.
Much later, at the end of the Second Dynasty (c. 2890–2686 BCE), King Peribsen used the Set animal in writing his serekh -name, in place of the traditional falcon hieroglyph representing Horus. Source: Internet
His successor Khasekhemwy used both Horus and Set in the writing of his serekh. Source: Internet