There are five batsman who hit six sixes . Let start the first batsman ever hit six sixes in a over is Sir Garfield Sobers -Nottinghamshire in 1968 (England).
He made a historic achievement on August 31,1968. The first cricketer to smash 6 sixes in a over at in first class cricket.
2: Ravi Shastri - Bombay ,1985 (India)
It took 16 years for someone to match Sir Gary's achievement and it was Indian batsman Ravi Shastri , who, in the year 1984. He scored in against left arm spinner Tilak Raj in a Ranji Trophy. Match between Bombay vs Baroda.
3:Hershell Gibbs - South Africa , 2007
South Africa opening batsman Hershell Gibbs was the first batsman who 6 sixes in an over in a ODI MATCH.
4 : Yuvraj Singh- India,2007
Indian batsman Yuvraj Singh is know as to be one of the most flamboyant cricketer in modern Era. Yuvraj went all guns blazing when he sent Stuart broad for six ruthless maximum in a over during the world T20 2007 against England.
5: Alex Hales - Nottinghamshire , 2015 (England).
Alex Hales , while playing Nottinghamshire in the NatWest T20 Blast against Warwickshire.