Sarah was the wife of Abraham. She was very beautiful even in her old age.
Her Hebrew name means Princess, the mother of the nations.
She was born in about 2155BC, had a son at 90 in 2065BC, and died at age 127.
She was one of the notable women of the Bible. Her former name was Sarai, which in Hebrew means Jah is prince in Hebrew.
She was also a half sister to Abraham as they had the same father, Terah, but not the same mother.
29 Abram and Nahor took wives for themselves. The name of Abramís wife was Sarai, and the name of Nahorís wife was Milcah. She was the daughter of Haran, who was the father of Milcah and Iscah. 30 Sarai was barren, so she had not borne children.
31 Terah took his son Abram, his grandson Lot (Haranís son), and his daughter-in-law Sarai, his son Abramís wife, and they journeyed together from Ur of the Chaldeans to go to the land of Canaan. But when they had gone as far as Haran, they settled there,
Look up the Bible for the life of Sarah - Genesis 11:29-23:20
Most people know Sarah as the barren wife of Abraham. She was also his half-sister (same father—different mothers), which came from tribal marriage alliances in Hebrew times. This is how (in Genesis) Abraham could claim to the Egyptians that Sarah was his sister.