The correct spelling of my first name is: 'Jörg.'
If no 'ö' is available, as is often the case on non-German
keyboards, or where no 8-bit characters are allowed, as in e-mail
addresses, this o-umlaut is generally replaced by 'oe', which leads
to 'Joerg.'
The spellings 'Jorg' or 'Jöerg' are
never ever correct.
The correct pronounciation of my name comes close to what English speakers would say if they had to read the word 'Yirk' or 'yerque.' (No, it's not jerque!) The 'ö' sound is pretty close to the sound of the 'o' in 'word' or the 'i' in 'girl'.