Despite a greater focus on gender equality in Australia's boardrooms, there are more chief executive officers named "Andrew" leading ASX 200 companies than there are women, a new report has found.

The author of the study, Conrad Liveris, said it was "deeply concerning" that there were more men with the same first name at the helm of the nation's top 200 listed companies than there were female chief executives.

According to his findings, 7 per cent of all ASX 200 CEOs were Andrews and only 5.5 per cent were women (incidentally the same percentage as bosses named "Michael").

There's not much diversity in the ranks of Australia's most powerful business leaders. Credit:Louie Douvis

"The average Australian CEO is a man, most likely named Andrew or Michael," Mr Liveris found in his report, sourcing data from publicly available company disclosures and ABS data. "Before becoming CEO, he likely headed a business unit or was the chief financial officer of that company."