The latest criticism comes as Labour holds its annual conference in Liverpool.
On Tuesday night, Ms Nandy tweeted an extract from her speech, which included the words: “Women’s rights are human rights and human rights are non-negotiable.
“My absolute priority will be to embolden and empower women and girls in every part of the world.”
This incensed Ms Rowling, who replied: “You said rapists should be transferred to women’s prisons if they self-identify as women.
“You called Woman’s Place UK a hate group.
“Given that you’re one of the biggest reasons many women on the Left no longer trust Labour to defend their rights, do you stand by these comments?”
Ms Rowling was referring to a question and answer session at the Labour conference in 2020, just after Sir Keir became leader.
JK Rowling: Nandy 'one of the biggest reasons' women on Left don't trust Labour (yahoo.com)