This name is the phonetic spelling of the Irish Aislinn, pronounced ASH-lin, which means dream. Related to Aisling, pronounced ASH-ling, meaning dream, vision.
From: What to Name the Baby by Evelyn Wells (1946) [Note: There is no entry for Ashley or its variants in the "Girls" list. However, it is an old name from ancient times and is found under the "Boys" section.] ASHE: Middle English, German, Danish, Latin, Greek. "the beech tree." Old British "plant" name, for the ash or beech. Variations: Ash, Ashe, Asche, Ach, Ashford. AHSER: Hebrew. "happy one." In the Bible, he was a son of Jacob by Zilpah, of whom Moses said, "Let Asher be blessed." His tribal descendants in Palestine were the Asherites. Medieval England also used this Bible name as an "occupational" name, for a man who carried away ashes. ASHLEY: Old English, "from the ash-tree lea or meadow." Variations: (English) Asheley, Ashley ASHUR: Hebrew. "man of Horus." (Horus was the Egyptian false god of the sky.) Assyria was named for Horus. Variations: Ashur, Assur, Ashhur.