Deluminator or put-outer which was given to him in dumbledores will
No, neither George or Dhani have middle names.
Camilla Rosso and Rebecca Rosso.I'm not sure what their middle names are.
He doesnt have one.
He doesn't have one according to his blog. Some people are born without middle names.
knock
with the magic of dumbledores testicles
Wand coloured.
In the Room of Requirement.
WHERE? IF you mean what is his patronus, I think it's a phoenix
none of the wright children had middle names.
Yes, the Cimorelli sisters do have middle names. Their middle names are Marie, Elise, Anne, Lynn, Renae, and Christine.
The middle names are the same as the first names, they are used interchangeably just like names in English or French.
People in this time didn't have middle names. Their names told what they did or where they were from. Sometimes it gave both. Middle and last names came later.
Phoenix's feather - It is feather from Dumbledores phoenix Fawkes.
The order of the Pheonix
If you are referring to the book: Harry reads an article about Dumbledore written by Elphias Doge; Dumbledores old friend. It explains a lot about Dumbledores childhood. After that harry reads another article about Dumbledore written by Rita Skeeter. This article explains more detail about Dumbledores childhood too.