How is Lake Tiberias better known in the Bible?

Lake in Palestine not Israel

from Britannica.com: Galilee, Hebrew Ha-galil, northernmost region of ancient Palestine, corresponding to modern northern Israel. ... Its biblical boundaries are indistinct; conflicting readings leave clear only that it was part of the territory of the northern tribe of Naphtali

Is it first century B C or A D. It's better to use Jesus or Lord as a time frame