Comedian, actress and writer Maddy Anholt died at the age of 35 after being diagnosed with brain cancer a year ago.
Her family said they learned of the condition of the BBC Radio 4 star, who campaigns against domestic violence, after the birth of her daughter.
Farah Nazeer, chief executive of Women's Aid, said the charity was "devastated" following the loss of their ambassador.
Ms Anholt spent her final weeks at her parents' home in Devon, her family said.
“It is with great sadness that we announce the death of our beloved daughter, sister, twin, friend, wife and mother, Maddy Anholt, who left this world on Wednesday, September 13, at the age of 35,” they said in a statement regarding Just Giving. .
Ms Anholt appeared on BBC Three's Comedy Sunny D and has also appeared in ITV's comedy series The Emily Atack Show and on the broadcaster's This Morning.
'Grace and courage'
He also had his own BBC Radio comedy series in 2017, about a failed vape cafe called No Smoke in Dundee, Scotland.
In 2015, she took her one-woman comedy Diary Of A Dating Addict to the gilded ball at the Edinburgh Festival Fringe and the Soho Theatre.
Her family continued: "You may know that Maddy was diagnosed with a rare and aggressive form of brain cancer shortly after the birth of her incredible daughter, Opal, last year.
“She undertook the subsequent surgery and treatment with astonishing grace and courage, accompanied by her family and devoted husband Ben every step of the way.
"She spent her final weeks at her parents' home, Sunflower House, surrounded by love and tranquility and the sounds of nature all around."Ms Anholt wrote the handbook How to Leave a Psychopath, which looks at coercive control and abusive relationships, last year, and her first novel, Red Flags, will be published next year.
