Ptolemy II Philadelphus in Wikipedia
Ptolemy II Philadelphus (Greek: Πτολεμαῖος Φιλάδελφος, Ptolemaĩos Philádelphos" 309 BCE–246 BCE), was the king of Ptolemaic Egypt from 283 BCE to 246 BCE. He was the son of the founder of the Ptolemaic kingdom Ptolemy I Soter and Berenice, and was educated by Philitas of Cos. He had two half-brothers, Ptolemy Keraunos and Meleager, both of whom became kings of Macedonia (in 281 BCE and 279 BCE respectively). Both died in the Gallic invasion of 280-279 BCE (see Brennus).
Ptolemy II erected a commemorative stele, the Great Mendes Stela. Ptolemies III through V also erected steles.
He began his reign as co-regent with his father Ptolemy I from ca. 290 BCE–ca. 283 BCE, and maintained a splendid court in Alexandria.
Egypt was involved in several wars during his reign. Magas of Cyrene opened war on his half-brother (274 BCE), and the Seleucid king Antiochus I Soter, desiring Coele-Syria with Judea, attacked soon after in the First Syrian War. Two or three years of war followed. Egypt's victories solidified the kingdom's position as the undisputed naval power of the eastern Mediterranean; his fleet (112 ships) bore the most powerful naval siege units of all time, guaranteed the king access to the coastal cities of his empire. The Ptolemaic sphere of power extended over the Cyclades to Samothrace, and the harbours and coast towns of Cilicia Trachea, Pamphylia, Lycia and Caria.
The victory won by Antigonus II Gonatas, king of Macedonia, over the Egyptian fleet at Cos (between 258 BCE and 256 BCE) did not long interrupt Ptolemy's command of the Aegean Sea. In a Second Syrian War with the Seleucid kingdom, under Antiochus II Theos (after 260 BCE), Ptolemy sustained losses on the seaboard of Asia Minor and agreed to a peace by which Antiochus married his daughter Berenice (c. 250 BCE).
Ptolemy's first wife, Arsinoe I, daughter of Lysimachus, was the mother of his legitimate children:
* Ptolemy III Euergetes, his successor.
* Berenice Phernopherus, married Antiochus II Theos, king of Syria.
After her repudiation he married his full sister Arsinoe II, the widow of Lysimachus-an Egyptian custom-which brought him her Aegean possessions.
Ptolemy had several concubines. With a woman named Bilistiche he had an (illegitimate) son named Ptolemy Andromachou 
Other mistresses include: Agathoclea (?), Aglais (?) daughter of Megacles, the cupbearer Cleino, Didyme, the Chian harp player Glauce, the flautist Mnesis, the actress Myrtion, the flautist Pothine and Stratonice. 
The material and literary splendour of the Alexandrian court was at its height under Ptolemy II. Pomp and splendor flourished. Ptolemy deified his parents and his sister-wife, after her death (270 BCE). Ptolemy staged a procession in Alexandria in honor of Dionysus led by 24 chariots drawn by elephants and a procession of lions, leopards, panthers, camels, antelopes, wild asses, ostriches, a bear, a giraffe and a rhinoceros. According to scholars, most of the animals were in pairs - as many as eight pairs of ostriches - and although the ordinary chariots were likely led by a single elephant, others which carried a 7-foot-tall (2.1 m) golden statue may have been led by four.
Callimachus, keeper of the library, Theocritus, and a host of lesser poets, glorified the Ptolemaic family. Ptolemy himself was eager to increase the library and to patronize scientific research. He had exotic animals of far off lands sent to Alexandria. Although an enthusiast for Hellenic culture, he also adopted Egyptian religious concepts, which helped to bolster his image as a sovereign.
The tradition preserved in the pseudepigraphical Letter of Aristeas which connects the Septuagint translation of the Old Testament into Greek with his patronage is probably overdrawn. However, Walter Kaiser says, "There can be little doubt that the Law was translated in Philadelphus's time since Greek quotations from Genesis and Exodus appear in Greek literature before 200 B.C. The language of the Septuagint is more like Egyptian Greek than it is like Jerusalemite Greek, according to some."  Ptolemy had many brilliant mistresses, and his court, magnificent and dissolute, intellectual and artificial, has been compared with the Versailles of Louis XIV.
Ptolemy was of a delicate constitution. Elias Joseph Bickermann (Chronology of the Ancient World, 2nd ed. 1980) gives the date of his death as January 29.
Relations with India
Ptolemy is recorded by Pliny the Elder as having sent an ambassador named Dionysius to the Mauryan court at Pataliputra in India, probably to Emperor Ashoka:
"But [India] has been treated of by several other Greek writers who resided at the courts of Indian kings, such, for instance, as Megasthenes, and by Dionysius, who was sent thither by Philadelphus, expressly for the purpose: all of whom have enlarged upon the power and vast resources of these nations." Pliny the Elder, "The Natural History", Chap. 21 
He is also mentioned in the Edicts of Ashoka as a recipient of the Buddhist proselytism of Ashoka, although no Western historical record of this event remain.