From BiblePortal Wikipedia

Holman Bible Dictionary [1]

 Genesis 11:29-25:10

In her grief over her barrenness, Sarah gave her maid Hagar to Abraham in the hope of an heir; but she expressed resentment when Hagar conceived. When Sarah was almost 90 years old, God changed her name and promised her a son. A year later, she bore Isaac.

At the age of 127, Sarah died at Hebron, where she was buried in the cave in the field of Machpelah near Mamre.

In the New Testament,  Romans 4:19 refers to Sarah's barrenness as evidence of Abraham's faith;   Romans 9:9 cites her conception of Isaac as an example of God's power in fulfilling a promise.   Galatians 4:21-31 contrasts her with Hagar without naming her,   Hebrews 11:11 lauds her faith, and   1 Peter 3:6 describes her relationship with Abraham.

Judith Wooldridge

Smith's Bible Dictionary [2]

Sa'ra-i. (My Princess). The original name of Sarah , wife of Abraham .

Easton's Bible Dictionary [3]

 Genesis 11:31 17:15

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [4]

(Heb. Saray', שָׂרִי ; Sept. Σάρα ; Vulg. Sarai ) , the original name of Sarah, the wife of Abraham. It is always used in the history from  Genesis 11:29 to  Genesis 17:15, when it was changed to Sarah at the same time that her husband's name from Abram became Abraham, and the birth of Isaac was more distinctly foretold. The meaning of the name appears to be, as Ewald has suggested, "contentious." (See Sarah).