William Brabazon
William Brabazon may refer to:
- Sir William Brabazon (Leics [MP 1313)], MP for Leicestershire 1313 & MP for Northamptonshire 1343
- William Brabazon (Lord [Justice of Ireland)], government official in the Kingdom of Ireland
- William Brabazon, [1st Earl of Meath], Anglo-Irish peer
- Sir William Brabazon, [2nd Baronet], Anglo-Irish MP
- William Brabazon, [9th Earl of Meath], Anglo-Irish peer
- William Brabazon, [11th Earl of Meath], Irish peer