1. A messenger from Ezra to Iddo
Then sent I for Eliezer, for Ariel, for Shemaiah, and for Elnathan, and for Jarib, and for Elnathan, and for Nathan, and for Zechariah, and for Meshullam, chief men; also for Joiarib, and for Elnathan, men of understanding. (Ezra 8:16)
2. A symbolical name for Jerusalem
Woe to Ariel, to Ariel, the city where David dwelt! add ye year to year; let them kill sacrifices. Yet I will distress Ariel, and there shall be heaviness and sorrow: and it shall be unto me as Ariel. (Isaiah 29:1-2)
And the multitude of all the nations that fight against Ariel, even all that fight against her and her munition, and that distress her, shall be as a dream of a night vision. (Isaiah 29:7)