Umm Qais
Baron Edmond James de Rothschild's surveyor, Yitzhak Goldhar, claimed that Hadera was founded on the site of the former town called "Gedera of Caesarea" (), as mentioned in Tosefta "Shevi'it", ch. 7. Benjamin Mazar preferred to locate ancient "Gador", formerly known as "Gedera by Caesaria", at Tell Ahḍar ("green hill"), later known as Tell esh Sheikh Ziraq and currently as Tel Gador, on the coast south of Giv'at Olga. Others say that the ancient Gadera should be identified with Umm Qais or with al-Judeira.