Smith’s Bible Dictionary
“Pithom” means the city of justice
Pithom: one of the store-cites Israelites for the first oppressor, the Pharaoh "which knew not Joseph." (Exodus 1:11) It is probably the Patumus of Herodotus (ii. 1 159), a town on the borders of Egypt, nest which Necho constructed a canal from the Nile to the Arabian Gulf.