John Gill Commentary 1 Kings 11:1

"Now king Solomon loved many foreign women, together with the daughter of Pharaoh, women of the Moabites, Ammonites, Edomites, Sidonians, and Hittites;" — 1 Kings 11:1 (ASV)

But King Solomon loved many strange women
His love was a lustful and not a lawful one, and of women who were not only of foreign countries, but not his lawful wives, and these many:

together with the daughter of Pharaoh ;
besides her, or as he loved her, and perhaps more; his sin was not that he loved her who was his lawful wife, but others with her; it is very probable she was a proselytess, and had no hand in turning him to idolatry, since we read not of any high place built for an Egyptian idol:

women of the Moabites, Anmonites, Edomites, Zidonians, and Hittites ;
all of the neighbouring nations. Some think he did this with political views, to get intelligence of the state of those countries, or to abate and extinguish their enmity; but it rather seems to be the fruit of lust or pride.