Title: Sun
Content:  Sun's birthday was a holiday celebrated as Sol Invictus (literally "Unconquered Sun") soon after the winter solstice, which may have been an antecedent to Christmas. Regarding the fixed stars, the Sun appears from Earth to revolve once a year along the ecliptic through the zodiac, and so Greek astronomers categorized it as one of the seven planets (Greek planetes, "wanderer"); the naming of the days of the weeks after the seven planets dates to the Roman era. In Proto-Indo-European religion, the Sun was personified as the goddess *Seh2ul. Derivatives of this goddess in Indo-European languages include the Old Norse Sól, Sanskrit Surya, Gaulish Sulis, Lithuanian Saulė, and Slavic Solntse. In ancient Greek 
Title: True name
Content:  The true name of the Egyptian sun god Ra was revealed to Isis through an elaborate trick. This gave Isis complete power over Ra and allowed her to put her son Horus on the throne. Socrates in Plato's Cratylus considers, without taking a position, the possibility whether names are "conventional" or "natural" natural being the "True name" ([τῇ ἀληθείᾳ ὄνομα]), that is, whether language is a system of arbitrary signs or whether words have an intrinsic relation to the things they signify (this anti-conventionalist position is called Cratylism). Hellenistic Judaism emphasized the divine nature of logos, later adopted by the Gospel of John. The true name of God plays a central role in Kabbalism (see Gematria, Temurah, YHWH [the tetragrammaton]) and to some extent in Sufism (see 100th 
Title: Solar deity
Content:   A solar deity (also sun goddess or sun god) is a sky deity who represents the Sun, or an aspect of it, usually by its perceived power and strength. Solar deities and Sun worship can be found throughout most of recorded history in various forms. The Sun is sometimes referred to by its Latin name Sol or by its Greek name Helios. The English word sun stems from Proto-Germanic *sunnǭ.
Title: Helios
Content:  Helios is the Greek proper name for the Sun for both Ancient and Modern Greek, and additionally Helios, one of the craters of Hyperion, a moon of Saturn, is named after this Greek god. Several words relating to the Sun derive from "helios", including the rare adjective heliac (meaning "solar"), heliosphere, perihelion and aphelion among others.
Title: Vikram (name)
Content: Sur: Sun ; ya: present infinitive verb modifier In the Vedas, Vishnu's stride is also depicted as the rising, setting, and absence of the sun. The deity Surya is the primary name for the sun deity, one of the most ancient in the Hindu tradition. This name literally means:  Surya's name can be loosely translated literally as "the moving of the sun". In this sense, the deity Surya is then metaphorically one personification Vishnu's stride. In Smartism, Surya is commonly believed to be another manifestation of Vishnu, and is worshipped as a deity in his own right.
Title: Dazhbog
Content:  all Slavic languages, the word for Sun, Suntse, is of neutral or feminine gender, never masculine (however, there is an Old East Slavic epic character "Vladimir Beautiful Sun" or "Vladimir Bright Sun" (ru) which has the same place as Arthur in English culture). Also, in Baltic mythology, which is most akin to Slavic, Sun is a female deity, Saule, while the Moon is a male one. The same pattern can be observed in the folklore of many Slavic nations, where the Sun is most often identified with mother or a bride, and Moon with father or husband, their children being 
Title: Planetary nomenclature
Content:  Sun and Moon deities
Title: Solar deity
Content:  Copernicus describing the Sun mythologically, drawing from Greco-Roman examples: "In the middle of all sits the Sun on his throne. In this loveliest of temples, could we place the luminary in any more appropriate place so that he may light the whole simultaneously. Rightly is he called the Lamp, the Mind, the Ruler of the Universe: Hermes Trismegistus entitles him the God Visible. Sophocles' Electra names him the All-seeing. Thus does the Sun sit as upon a royal dais ruling his children the planets which circle about him."
Title: Helios
Content:  a table before him for ceremonial dining. Plouton Helios is mentioned in other literary sources as well; he is associated with Koure Selene and Helios Apollon; the sun on its nighttime course, while coming back from the west, was sometimes envisioned as travelling through the Underworld on its return to the east for the next day. Roman poet Apuleius describes a rite in which the sun appears at midnight to the initiate at the gates of Proserpina; the suggestion here is that this midnight sun could be Plouton Helios. Diodorus Siculus reported that the Chaldeans called Cronus (Saturnus) by the name Helios, or the sun, and he explained that this was because Saturn was the “most conspicuous” of the planets.
Title: Sun bear
Content:  The sun bear is named so for its characteristic orange to cream coloured, crescent-like chest patch. The generic name Helarctos comes from two Greek words: ήλιος (hēlios, 'related to the sun') and αρκτος (arctos, 'bear'). Another name is 'honey bear', beruang madu in Malay and Indonesian, in reference to its habit of feeding on honey from honeycombs. 'Honey bear' can also refer to the kinkajou.

Question: what is the real name of our sun?
Answer: The Sun.