What’s the usage of apostrophes in " ‘Bye, ‘bye "?

Question

I’d like to know what effect an apostrophe has which is before a word and doesn’t work as an omitter. (Not like *C’mon* or *‘Course*, but like *‘bye, ‘bye*.)I have three questions as follows, but any comments about this type of apostrophe are very welcome. My primary goal is to get its usage for future reading. **1. What effect does the apostrophized bye have in the following scene?**>”Will you come and visit me in my bathroom again sometime?” Moaning Myrtle asked mournfully as Harry picked up the Invisibility Cloak.>”Er … I’ll try,” Harry said, though privately thinking the only way he’d be visiting Myrtle’s bathroom again was if every other toilet in the castle got blocked. “See you, Myrtle … thanks for your help.”>” **‘Bye, ‘bye,** “ she said gloomily, and as Harry put on the Invisibility Cloak he saw her zoom back up the tap. (*Harry Potter 4* [US Version]: p.466)[Bold font is mine]**N.B.:** Moaning Myrtle, a ghost, loves Harry, but one-sided. She wants him to come to the bathroom where she lives whenever he can. She sees Harry for the first time in a long time.**2. How would you pronounce it?****3. Are there any other examples for this type of apostrophe?**

Answer 1

In both possibilities that I know of the apostrophe is being used as an omitter. One is the term "goodbye". By saying 'bye 'bye it is like a cuter way of goodbye which Myrtle could be doing to appear coy or more vulnerable since she likes him. The other would be a variation of "by and by" which alone means "at a later date or time", but changing it up to sound more like a farewell would show both a desire to say farewell, but to also show she really hopes to see him again. The funny thing is that this term is often used when referring to someone who is deceased which would create a double meaning since Myrtle is dead, but also hoping she will see him at a later time. The saying would be pronounced like saying "buy buy". Finally, and unfortunately, I can not think of another example such as this that I could share but I hope this helps.