But Giannis is asking why a person, who was disfellowshipped for having a kidney transplant, should repent of something that the Org. no longer believed was wrong.
'Jehovah' is just the anglicized version of the Name which was adapted from the Latin version of it. Many other languages don't have the hard English 'J' sound anyway - they have a 'Y' (ya) sound instead (like the Hebrew letter 'yod'). The 'W' is from the Hebrew letter which is pronounced 'vav.'
Whether the original Hebrew Name consisted of two or three syllables, and which are the correct vowels ... that's for people with far better knowledge than I to debate. But what we have is an approximation.
Imho, sometimes people can become too obsessed with trying to figure out the 'correct' pronunciation. If pronouncing the Name 'just so' was that important, you'd think the method would have been preserved in the Bible for posterity.