Al-Wahid
Allah is Al-Waahid, The One and the only God. There is no alternative, he is the sole originator from which all has arisen. He has no partners or relationships. None is equal to Him.
From the root w-h-d which has the following classical Arabic connotations: to be one, to be made one, to be called one to connect, join, unite to be unique, singular to be one apart from others
If Allah had intended to take a son, He could have chosen from what He creates whatever He willed. Exalted is He;
He is Allah, the One, the Prevailing. (Quran 39:4)
Say, [O Muhammad], “I am only a warner, and there is not any deity except Allah, the One, the Prevailing. (Quran 38:65)
[It will be] on the Day the earth will be replaced by another earth, and the heavens [as well], and all creatures will come out before Allah, the One, the Prevailing. (Quran 14:48)
Say, “Who is Lord of the heavens and earth?” Say, ” Allah.” Say, “Have you then taken besides Him allies not possessing [even] for themselves any benefit or any harm?” Say, “Is the blind equivalent to the seeing? Or is darkness equivalent to light? Or have they attributed to Allah partners who created like His creation so that the creation [of each] seemed similar to them?” Say, ” Allah is the Creator of all things, and He is the One, the Prevailing.” (Quran 13:16)