The Trinity as a Christian doctrine, states that God exists as three persons, or in the Greek hypostases (that which stands beneath), but is one being. The persons are understood to exist as God the Father, the God the Son (incarnate as Jesus Christ), and God the Holy Spirit.
Trinity Sunday is the first Sunday after Pentecost in the Western Christian liturgical calendar, and the Sunday of Pentecost in Eastern Christianity. Trinity Sunday celebrates the Christian doctrine of the Trinity, the three Persons of God: the Father, the Son, and the Holy Spirit.
The Trimurti (English: ‘three forms’; Sanskrit: trimūrti) is a concept in Hinduism "in which the cosmic functions of creation, maintenance, and destruction are personified by the forms of Brahmā the creator, Viṣṇu the maintainer or preserver, and Śiva the destroyer or transformer." These three deities have been called "the Hindu triad" or the "Great Trinity". They are often looked at as the creator, preserver and destroyer respectively.
According to the Ayyavazhi religion the Ayyavazhi Trinity is the incarnation of God in the current stage of world development (Kali Yukam). Ayya Vaikundar, the Incarnation, is the combination of the Ultimate God, Narayana and Human Being.
The avatar (incarnation) of Vaikundar is the combination of three dimensions of God and it happens in three stages.
* The Soul - The Soul of Ultimate God
* The Spirit - The Spirit (Karana Sarira) of Narayana
* The Body - The Body of Muthukutty (Human Being)
In ancient Indo-European mythologies, various goddesses or demi-goddesses appear as a triad, either as three separate beings who always appear as a group (the Greek Moirae, Charites, Erinnyes and the Norse Norns) or as a single deity who is commonly depicted in three aspects (Greek Hecate and the cult image of Latin Diana Nemorensis, of whom Hecate is one part). Often it is ambiguous whether a single being or three are represented, as is the case with the Irish Brighid and her two sisters, also called Brighid, or the Morrígan who is known by at least three or four different names. In most ancient portrayals of triple goddesses, the separate deities perform different yet related functions, and there is no obvious difference in their ages. In Wicca and related Neo-pagan religions, the Triple Goddess is, along with the Horned God, held in particular reverence, and her three aspects are most often portrayed as being of different ages: Maiden, Mother and Crone.