Eleazar was a Jewish martyr who died during the persecution of Judaism in Judea ordered by King Antiochus IV Epiphanes. Together with the woman with seven sons, he is one of the "Holy Maccabean Martyrs" celebrated by the Roman Catholic, Eastern Orthodox, and Oriental Orthodox churches. In the Eastern Orthodox calendar their feast day is August 1.
The main source of information about Eleazar is the book 2 Maccabees, although a variant account of someone named Eleazar is found in 3 Maccabees.