Bismillah ir Rehman ir Rahim
According to Dr Sharib:

"Al-Ahad is the One Who has no parallel or equal."

To emulate the name you should not take partners with Allah. Appropriate
recitation makes one believe firmly in the unity of Allah.

see 'The 99 Most Beautiful Names of Allah' by Dr Zahurul Hassan Sharib




Some other references:
Al-Ahad
Qur'an 112
The One
He Who is Uniquely One
Say; He is Allah
The One;

Allah, the Eternal, Absolute;

He begetteth not,
Nor is He begotten;

And there is none
Like unto Him.
Qul-Hu-Wallaahu 'Ahad;

'Allaahus-Samad;

Lam yalid, wa lam yuulad;

Walam yakul-la-Huu kufu-wan
'ahad.


(Qur'an 112)