Lake Gennesaret (from the town el-Ghuweir), Lake Tiberius (from the town of Tiberias, still there today), or The Sea of Galilee (from the name of the region).
All of the names refer to the towns and territory West of that "Sea" (technically no Sea at all but a fresh-water lake).
The Jordan flows into it from the North and the Jordan out of it to the South, down to the Dead Sea.
