History of the star: A star in the Dolphin, Delphinus. Rotanev is "Venator" backwards.

The strange names alpha (Sualocin) and beta (Rotanev) first appeared for these stars in the Palermo Catalogue of 1814, and long were a mystery to all. It was discovered their origin by reversing the component letters, and so reading Nicolaus Venator, the Latinized form of Niccolo Cacciatore, the name of the assistant and successor of the Italian astronomer Guiseppe Piazzi! Alpha is Sualocin = Nicolaus; beta is Rotanev = Venator.

But Miss Rolleston, in her singular book Mazzaroth, considered in some quarters [bibical] as of authority, wrote that they are derived, alpha (Sualocin) from the Arabic Scalooin, swift (as the flow of water) and beta from the Syriac and Chaldee Rotaneb, or Rotaneu, swiftly running (as water in the trough). For no part of this scholarly (!) statement does there seem to be the least foundation.

Hindus located in Delphinus the 22d nakshatra, Cravishtha, "Most Favorable", also called Dhanishtha, "Richest"; the Vasus, "Bright or Good Ones", being the regents of this asterism, which was figured as a Drum or Tabor [source of English tambourine - Delphinus gives a love of music]: beta marking the junction with Catabishaj.

[Star Names, Their Lore and Meaning, Richard Hinchley Allen, 1889]. 

Influences of 22nd Hindu Mansion: Favorable for commencing work of an impermanent or moving character, rich, generous, liberal, fond of music. 

[Fixed Stars and Constellations in Astrology, Vivian E. Robson 1923].

The astrological influences of the constellation: According to Ptolemy, Delphinus is like Saturn and Mars [in fact the bright stars Rotanev and Sualocin are Mercury-Jupiter]. It gives a simple appearance, cheerfulness, dissembling and duplicity, love of hunting, and sport in general but little happiness [little happiness and love of hunting might not apply to Rotanev and Sualocin, because they are not of Saturn/Mars nature]. There is a fondness for pleasure, ecclesiastical matters and travel, but danger of suffering from ingratitude. (Fixed Stars and Constellations in Astrology, Vivian E. Robson, 1923)

The astrological influences of the constellation given by Manilius:

"The sea-dark Dolphin ascends from the Ocean to the heavens and emerges with its scales figured by stars, birth is given to children who will be equally at home on land and in the sea. For just as the dolphin is propelled by its swift fins through the waters, now cleaving the surface, now the depths below, and derives momentum from its undulating course, wherein it reproduces the curl of waves, so whoever is born of it will speed through the sea. Now lifting one arm after the other to make slow sweeps he will catch the eye as he drives a furrow of foam through the sea and will sound afar as he thrashes the waters; now like a hidden two-oared vessel he will draw apart his arms beneath the water; now he will enter the waves upright and swim by walking and, pretending to touch the shallows with his feet, will seem to make a field of the surface of the sea; else, keeping his limbs motionless and lying on his back or side, he will be no burden to the waters but will recline upon them and float, the whole of him forming a sail-boat not needing oarage.

"Other men take pleasure in looking for the sea in the sea itself: they dive beneath the waves and try to visit Nereus and the sea nymphs in their caves; they bring forth the spoils of the sea and the booty that wrecks have lost to it, and eagerly search the sandy bottom.

From their different sides swimmers and divers share an equal enthusiasm for both pursuits, for their enthusiasm, though displayed in different ways, springs from a single source.

"With them you may also reckon men of cognate skill who leap in the air, thrown up from the powerful spring-board, and execute a see-saw movement, the first's descent throwing up the second and the plunge of the second lifting the first on high; or hurl their limbs through the fire of flaming hoops, imitating the dolphin's movement in their flight through space, and land as gently on the ground as they would in the watery waves: they fly though they have no wings and sport amid the air.

Even if the Dolphin's sons lack these skills, they will yet possess a physique suited to them; nature will endow them with strength of body, briskness of movement, and limbs which fly over the plain" [Manilius, Astronomica, 1st century AD, book 5, p.335].