Other trinitarian deities in places:

Greece – Zeus, Poseidon & Adonis.

Rome – Jupiter, Neptune & Pluto.

Germanic nations – Wodan, Thor & Fricco.

Phoenicians – Ulomus, Ulosuros & Eliun.

There’s Qur’anic texts (see below) which affirm uniqueness of God and none equal, similar or comparable to Him. He did not have a son (“He did not beget nor was He begotten”) like the belief of Christians or some Jews who believed in Uzair.

“Say (with a firm, resolute statement): “He is Allāh, (who is) uniquely One (in His perfect names, attributes, actions and His right to worship).

Allāh, the Eternal, Self-Sufficient Master (of utmost perfection in His attributes, to whom all creatures turn for their needs whilst He has none).

He did not beget (such that He became a father) nor was He begotten (such that He became a son).

And there is none equal, similar or comparable to Him (in His perfect names, attributes and actions).”

[Chapter 112]

“O people of the Scripture (Jews and Christians)! Do not exceed the limits in your religion, nor say of Allah aught but the truth. The Messiah ‘Iesa (Jesus), son of Maryam (Mary), was (no more than) a Messenger of Allah and His Word, (“Be!” – and he was) which He bestowed on Maryam (Mary) and a spirit (Ruh) created by Him; so believe in Allah and His Messengers. Say not: “Three (trinity)!” Cease! (it is) better for you. For Allah is (the only) One Ilah (God), Glory be to Him (Far Exalted is He) above having a son. To Him belongs all that is in the heavens and all that is in the earth. And Allah is All-Sufficient as a Disposer of affairs.”

[4:171]