As also mentioned in Wikipedia - http://wikipedia.qwika.com/en/Reyansh
Reyansh stands for Vishnu's Ansh. It is one of the names of vishnu avatars.
Vishnu (IAST viṣṇu, Devanagari विष्णु, with honorific Shri
Vishnu; śrī viṣṇu, श्रीविष्णु ), is a form of God, in Hinduism to whom
many Hindus pray. For Vaishnavas, He is the Ultimate Reality or God, as
is Shiva for Shaivites. In Trimurti belief, He is the second aspect of
God in the Trimurti (also called the Hindu Trinity), along with Brahma
Lord Krishna revealing his Universal form to Arjuna.
Known as the Preserver, He is most famously identified with His
avatars, or incarnations of God, most especially Krishna and Rama.
Additionally, another important name for Vishnu is Narayana.
- Followers of Vaishnavism, unlike Smartas, do not believe that
Vishnu is one of many personal forms of God or Saguna Brahman but
believe Him to be the Ultimate Reality (i.e., Brahman) exclusively. A
Smarta, on the other hand, would consider Vishnu and Shiva to be
different aspects of the same Supreme Being.
- Unlike Shaivism, Vaishnavism believes that Vishnu incarnates
periodically for the establishment and protection of righteousness, good
dharma and destruction of evil adharma;
- Smartas who follow Advaita philosophy, believe that deities
such as Vishnu or Shiva are various forms of one ultimate higher power
("Brahman"), which higher reality has no specific form, name, face or
features. This idea is encapsulated in the term "Nirguna Brahman"
("featureless reality"). The Vaishnava sect (worshippers of Vishnu)
however believes that God can transcend all personal characteristics yet
can also have personal characteristics for the grace of the human
devotee. Personal characteristics are considered an aid for the devotee
to focus on God.
- The Vaishnava sect also believe that it is not
necessarily wrong to view a form of God as long as it is recognized that
God is not limited to a particular form.
Nonetheless, there are many
sects of Vaishnavas, most notably Vadakalai Iyengars, who believe that
Vishnu's authentic form is not beyond human comprehension, and that His
form is exactly as shown in pictures and idols.
Vaishnavite Hindus also worship Vishnu in an abstract form (i.e., God
with vague form) as a saligrama stone. Use of the saligrama is similar
to the use of lingam, a form of Shiva.