Genesis 18:1-33

Abraham : a son of Terah; the father of Isaac; ancestor of the Jewish nation.,the son of Terah of Shem

Gomorrah : an ancient city known for its sin whose ruins are said to be visible from the Masada,a town destroyed with Sodom by burning sulphur
(31° 9´, 35° 28´)

Mamre : a place where Abraham camped, probably a few km north of Hebron,an Amorite chief who was Abraham's ally, with Eshcol and Aner
(31° 32´, 35° 5´)

Sarah : the wife of Abraham and the mother of Isaac,daughter of Terah; wife of Abraham

Sodom : an ancient town somewhere in the region of the Dead Sea that God destroyed with burning sulphur,a town 25 km south of Gomorrah and Masada
(31° 11´, 35° 23´)

Genesis 16:5

Abram : the son of Terah of Shem

Sarai : a layman of the Binnui Clan who put away his heathen wife