Necho I in Wikipedia
Necho I (sometimes Nekau) (672 BC–664 BC) was the prince or governor of the Egyptian city of Sais. He was the first attested local Saite king of the twenty-sixth dynasty of Egypt who reigned for 8 years, according to Manetho's Epitome. Egypt was reunified by his son, Psamtik I. Necho I is primarily known from Assyrian documents but is now also attested in one contemporary Egyptian document from his reign. He was officially "installed" at Sais by Assurbanipal around 670 BC, but he already ruled Egypt as a local king prior to this event. According to historical records, Necho I was killed by an invading Kushite force in 664 BC under Tantamani for being an ally of Assyria. The Nubian invasion into the Egyptian Delta was subsequently repelled by the Assyrians who proceeded to advance south into Upper Egypt and sack Thebes.
Necho I's year 2 is now attested on a privately held donation stela that was first published by Olivier Perdu  The stela records a large land donation to the Osirian triad of PerHebyt (modern Behbeit el-Hagar near Sebennytos) by the "priest of Isis, Mistress of Hebyt, Great Chief...son of Iuput, Akanosh."
Necho was perhaps the brother of Nekauba--whose status as a king of Sais is currently unproven. Necho married Istemabet, and they were the parents of Psamtik I and his sister.