I changed my name

[Philippus Flavius Homovallumus]

Well Australian and American culture in terms of the lines (grandfather, father, son etc) are a bit different...

I was going to say Michael/Mike but changed to Rob...

I don't know anyone that goes by their middle name here.

Never understtod this.

What sort of person calls the child "Mike"?

If you give the child the proper name then they're free to use the petty one and the proper version goes on every legal document, so there's never any confusion.

Though, I'm biased as I loath being refered to as "Phil" though most of my male friends ignore that.