al-Hayy (The Ever-Living).
“Allaah, there are none worthy of worship except Him, al-Hayy, the One who establishes and sustains.”
Sooratul-Baqarah [2:255]
Reference:
Exemplary principles concerning the beautiful names of Allaah.
Shaykh Muhammad Ibn Saalih Al-‘Uthaymeen D. 1421 H
Translated by Moosaa Richardson
Revised 2nd Edition with additional commentary.