Nehemiah is the central figure of the Book of Nehemiah, which describes his work in rebuilding Jerusalem during the Second Temple period. He was governor of Persian Judea under Artaxerxes I of Persia (465–424 BC). The name is pronounced // or // in English. It is in Hebrew נְחֶמְיָה, Nəḥemyāh, "Yah comforts".
Most scholars believe Nehemiah was a real historical figure and that the Nehemiah Memoir, a name given by scholars to certain portions of the book written in the first person, is historically reliable.
In the 20th year of Artaxerxes I (445 or 444 BC), Nehemiah was cup-bearer to the king. Learning that the remnant of Jews in Judah were in distress and that the walls of Jerusalem were broken down, he asked the king for permission to return and rebuild the city, around 20 years after Ezra's arrival in Jerusalem in 468 BC. Artaxerxes sent him to Judah as governor of the province with a mission to rebuild, letters explaining his support for the venture, and provision for timber from the king's forest. Once there, Nehemiah defied the opposition of Judah's enemies on all sides—Samaritans, Ammonites, Arabs and Philistines—and rebuilt the walls within 52 days, from the Sheep Gate in the North, the Hananeel Tower at the North West corner, the Fish Gate in the West, the Furnaces Tower at the Temple Mount's South West corner, the Dung Gate in the South, the East Gate and the gate beneath the Golden Gate in the East.
Appearing in the Queen's presence may indicate that he was a eunuch, and in the Septuagint, the Greek translation of the Hebrew Bible, he is described as such: eunochos (eunuch), rather than oinochoos (wine-cup-bearer). If so, the attempt by his enemy Shemaiah to trick him into entering the Temple is aimed at making him break Jewish law, rather than simply hide from assassins.
He then took measures to repopulate the city and purify the Jewish community, enforcing the cancellation of debt, assisting Ezra to promulgate the law of Moses, and enforcing the divorce of Jewish men from their non-Jewish wives.
After 12 years as governor, during which he ruled with justice and righteousness, he returned to the king in Susa. After some time in Susa he returned to Jerusalem, only to find that the people had fallen back into their evil ways. Non-Jews were permitted to conduct business inside Jerusalem on the Sabbath and to keep rooms in the Temple. Greatly angered, he purified the Temple and the priests and Levites and enforced the observance of the law of Moses.
The Second Book of Maccabees says Nehemiah is the one who brought the holy fire for the altar back from the diaspora to Jerusalem and founded a library of the Holy Scriptures just as Judas Maccabeus did. Here, Nehemiah’s political role sets an example for the Hasmonean dynasty and becomes a role model for pious, national leadership in general. The scene of reading and explaining the Torah in Neh 8 became the model of synagogue worship. See 2 Maccabees 2:13.
Ben Sira’s hymn in praise of the fathers mentions only Nehemiah (not Ezra) after Zerubbabel and Joshua and praises him for his building activities (Sir 49:15).
One rabbinic text, or aggadah, identifies Nehemiah as Zerubbabel, with the latter being considered an epithet and indicating that he was born in Babylon. Another oral tradition, or mishnah, records that Nehemiah was blamed for seeming to boast (Neh. v. 19 & xiii. 31), and disparage his predecessors (Neh. v. 15). This tradition asserts that his book was appended to the Book of Ezra, as a consequence, rather than being a separate book in its own right, as is the case in the Christian Old Testament. Another Talmudic text, or Baba Bathra, records that Nehemiah completed the Book of Chronicles, which was said to have been written by Ezra. 
Samuel Taylor Coleridge commented on the dearth of a classical painting featuring Nehemiah.
The essential historicity of the events described [in Ezra and Nehemiah] has rarely been questioned.