There exists a relation of the Sikhism from Hinduism and Islam. The Sikh shares Hindu terminologies including Vedas references. The gods/goddesses of Hindus are acknowledged in the Sikh religion namely: Vishnu, Shiva and Brahma. They used to call their one true God as "Allah", the same title provided by the Muslim to their one true God.
Sikhism is a monotheistic religion, or a religion that believes in one God. The supporters are known as "Sikhs", and their holy book is the Sri Guru Granth Sahib.