There was never a Hebrew kingdom in "Palestine". The united kingdom of the Hebrews was the land of Israel. (It was later renamed "Palestine" by the Romans after they expelled the Jews from the land and took control.
In the land of Israel (formerly Canaan).
No there is no record outside the Bible for the Hebrews to have been slaves in Egypt. If they were then it was in the New Kingdom about 1,000 years after the Giza pyramids were built.
It was called Eretz Yisra'el (ארץ ישראל), which means "the Land of Israel."
The United Hebrew Kingdom was a kingdom that existed in what is now Israel and beyond from 1030 BC - 930 BC.
The pyramids were built in the Kingdom of Egypt.
It's had several names over the millenia:Cana'an or CanaanThe Land of IsraelIsrael & JudeaIsraelPalestineThe State of Israel
Hebrew = malkhut (מלכות)Greek = vasíleio (Βασίλειο)
Israel
Canaan is significant to the Hebrew people, as it is the promised land, land of milk and honey.
The Kingdom of Israel and the Kingdom of Judah.
God's kingdom = mamléchet Elohím (ממלכת אלקים)