Brown Driver Briggs

 Zoan = "place of departure"
1. an ancient city of lower Egypt called Tanis by the Greeks; located
on the eastern bank of the Tanitic branch of the Nile; the capital
of the Shepherd dynasty, built 7 years after Hebron and existing
before Abraham and the dwelling place of the Pharaoh at the time
of the exodus
  1) modern 'San'