Gessen

Only in the land of Gessen, where the children of Israel were, the hail fell not.

The land of Egypt is before thee: and make them dwell in the best place, and give them the land of Gessen.

Perhaps Gersen or Gessen are only corruptions of the name of Gerson.

And he sent Juda before him to Joseph, to tell him; and that he should meet him in Gessen.