Enter your full "legal" birth name as written on your original birth certificate (first, middle and last names) - even if any name was misspelled.
If you do not have a middle name, just leave it blank. If your middle name is only an initial and not spelled out, then enter your middle initial only, and if you have a middle name, then enter your full middle name.
Jr., Sr., III etc. are considered to be extensions. Do not enter ANY EXTENSION added to a name; enter the NAME ONLY.
Do not use any symbols, punctation marks or numbers. Spaces should not affect the calculation and are necessary by default.