These names have been applied respectively to the first two and the last two chapters of 2 (4) Esdras in the Latin Bible of 1462. In matter these chapters, which are of Christian origin, agree in the main with the genuine parts of 2 (4) Esdras. See foregoing article.
The International Standard Bible Encyclopedia
Esdras 5 and 6
The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.