It follows Ab

• 12th month of the Jewish calendar
• Month of the Jewish calendar
• End of the Jewish calendar
• Av successor
• The sixth month of the ecclesiastical year in the Jewish calendar (in August and September)
• Sixth ecclesiastical Jewish month
• Last Hebrew month
• The twelfth month of the civil year
• Preceder of Tishri on a calendar

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Elul \E"lul\, n. [Heb.] The sixth month of the Jewish year, by the sacred reckoning, or the twelfth, by the civil reckoning, corresponding nearly to the month of September.