Abdul Wahhab bin Rustum (d. 211 AH)
Beliefs: Khawarij
Declared Muslims who commit sins as disbelievers
Rebelled against Muslim governments
Although his name was Abdul Wahhab, his followers were called "Wahhabi."
Muhammad bin Abdul Wahhab (d. 1260 AH)
Beliefs: Ahlus-Sunnah Wal-Jama'ah
All sins are forgiven by Allah before the soul reaches the throat
Submitted to and obeyed Muslim governments
His father's name was Abdul Wahhab, so his followers should have been called
"Muhammadi."