The original name of our Saviour was not Jesus or Iesous, but Yahshua. In our Saviour's word, His Father's Name was given to Him. The Father's Name is Yahweh.
Two factors contributed greatly to the substitution and the distortion of our Saviour's Name. The first was the superstitious teaching of the Jews that the Father's Name is not to be uttered and that the Name must be "disguised" outside of the temple of Jerusalem. The second factor was the strong anti-Judaism feeling that prevailed amongst the Gentiles. They wanted a saviour, but not a Jewish one.
According to Worterbuch der Antike, the substitute name can be traced back to the Latin Iesus and the Greek Iesous. Then, it can be traced back to an adaptation of the name of the Greek healing goddess Ieso. The Greek-English Lexicon of Liddell and Scott, confirm this. To Greeks who venerated a healing goddess Ieso, a saviour Iesous must have been most acceptable, suggests a writer in Philologische Wochenschrift. In spite of attempts to justify the "translating" of the Father's Name and His Son's Name, it cannot be done. A person's name remains the same in all languages.
The father of the Greek goddess Ieso was Asclepius, the deity of healing. The father of Asclepius was Apollo, the great sun-deity. Thus, the name Iesous can be traced back to sun-worship. There is also a relationship to the Egyptian goddess Isis and her son Isu. According to Reallexikon der Agpyptischen Religionsgeschichte, the name of Isis appears in hieroglyphic inscriptions as ESU or ES. Isu and Esu sound exactly like "Jesu" that the Saviour is called in the translated Scriptures of many languages.
Esus was a Gallic deity comparable to the Scandanavian Odin. The Greek abbreviation for Iesous is IHS, which is found on many inscriptions made by the Church during the middle Ages. IHS was the mystery name of Bacchus (Tammuz), another sun-deity. These are a few examples only.
Here is a quote from Dictionary of Christian Lore and Legend, by J. C. J. Metford:
"It is known that the Greek name endings of sus, seus, and sous (which are phonetic pronunciations for Zeus) were attached by the Greeks to names and geographical areas as a means to give honor to their supreme deity, Zeus. Examples given are: Parnassus, a sacred mountain in Greece: the Greek deity of wine and son of Zeus, Dionysus; the Greek hero of the Trojan war was Odysseus, and the Greek deity of healing was Iesous or the Latin Iesus/Jesus. They also changed the names of the prophets EliYahu (whose name means 'my mighty one is Yah') and Elyesha (whose name means 'my mighty one saves'), to 'Elias' and 'Eliseus' (which means 'my mighty one is Zeus'). This was done so often that it later was the basis for their rules of written grammar which followed the common or vernacular spoken language."