The Hadith Evidence
Multiple hadiths reference the Greatest Name without definitively naming it:
“Allah has ninety-nine names — one hundred minus one. Whoever enumerates them enters paradise.” (Bukhari/Muslim) — this refers to the known names, but the tradition of the Greatest Name goes further.
“The Greatest Name of Allah appears in Surah al-Baqara in verse 2:255 [Ayat al-Kursi] and in Surah Al-Imran in verse 3:2 and in Surah Ta-Ha.” The shared element in these verses: “Allah — there is no deity except Him, the Ever-Living (al-Hayy), the Sustainer of existence (al-Qayyum).”
The Candidates Proposed by Scholars
Allah: The Supreme Name itself, subsisting all other names. Al-Ghazali argues that Allah is not a derived name but a proper name — hence unique as the Greatest Name.
Al-Hayy al-Qayyum (the Ever-Living, the Self-Sustaining): Most consistent with the hadith evidence. Found in Ayat al-Kursi and its Quranic parallels.
Al-Ahad al-Samad (the Unique, the Eternally Besought): From Surah al-Ikhlas, given the hadith that it equals one-third of the Quran.
The Hidden Nature as Wisdom
Just as Laylat al-Qadr is hidden in the last ten nights of Ramadan so that believers seek it every night, the Greatest Name is concealed so that worshippers invoke all names with attention and sincerity — not merely one as a formula. The hiding is itself an act of divine mercy: the seeker becomes one who knows all the names, not just a mechanical user of a single key.
Ismaili Ta’wil Reading
In Ismaili hermeneutics, the Ism al-A’zam has a batin: the speaking name of Allah in each age is the Imam, through whom du’a reaches its intended destination. The da’i who calls through the Imam calls through the Greatest Name.
See also: Dhikr, Tawhid Divine Unity, Batin Zahir, Tawassul, Surah Al Ikhlas, Quran Sciences