Author of the Book of Lamentations

Author - Jeremiah (According to the Bible and Jewish Tradition). The first four poems are arranged in an acrostic form with each containing 22 verses which correspond with the 22 consonants of the Hebrew alphabet. In chapter 3 each letter of the Hebrew alphabet is allotted 3 of the 66 verses which comprise the poem. Some conclude that the reason for this was because Israel had sinned from beginning to end (A-Z, or in the Hebrew aleph-tav). Jeremiah, who wrote the lamentations was an eyewitness of the events, and this brought him great sorrow for he knew the people, he knew the city, he knew the children, and he knew the festivities that existed among the people of Judah. Interesting note: The Jewish translators of the Septuagint (LXX) attribute Jeremiah as the author of the Lamentations, and so do other ancient translations: The Aramaic Targum, the Latin Vulgate, and the Syriac Peshitta, and the Babylonian Talmud.

Link: https://bible-history.com/old-testament/bookoflamentations