The title of this prophetic book is also the name of its writer.
Haggai referred to himself as simply "the prophet Haggai"(1:1; et al.) We know nothing about Haggai's parents, ancestors, or tribal origin. His name apparently means "festal"or possibly "feast of Yahweh."1It is a form of the Hebrew word hag, meaning "feast."This has led some students of the book to speculate that Haggai's birth may have occurred on one of Israel's feasts. Ezra mentioned that through the prophetic ministries of Haggai and Zechariah the returned Jewish exiles resumed and completed the restoration of their temple (Ezra 5:1; 6:14; cf. Zech. 8:9; 1 Esdras 6:1; 7:3; 2 Esdras 1:40; Ecclesiasticus 49:11). Haggai's reference to the former glory of the temple before the Babylonians destroyed it (2:2) may or may not imply that he saw that temple. If he did, he would have been an old man when he delivered the messages that this book contains. In this case he may have been over 70 years old when he prophesied. However it is not at all certain that the reference in 2:2 implies that he saw the former temple.
Some editions of the Greek Septuagint and the Latin Vulgate versions of the Book of Psalms attribute authorship of some of the Psalms to Haggai and or Zechariah (i.e., Ps. 111-112, 125-126, 137-138, and 145-149). There is no other evidence that either prophet wrote any of these psalms. The reason for the connection appears to have been the close association that these prophets had with the temple where these psalms were sung.