“We have lost an incredible, caring and beautiful sister who left this world far too soon,” Jebina Yasmin Islam told the huge crowd in Pegler Square in Kidbooke, south-east London.
“Words can’t describe how we feel, we feel like we’re stuck in a bad dream and can’t get out of it – our world is shattered, we’re just lost for words.
“No family should go through what we are going through. “
Nessa, 28, was attacked and killed near the square on her way to a friend’s house.
A 38-year-old man arrested on suspicion of murder was released under investigation earlier Friday, as police continue to pursue a man captured by CCTV near the scene.
Moments before the vigil began, the Duchess of Cambridge said she was “saddened by the loss of another innocent young woman on our streets”.
“My thoughts are with Sabina’s family and friends, as well as everyone who was touched by this tragic event,” Kate tweeted.
In March, the Duchess privately visited the memorial to murdered marketing manager Sarah Everard at Clapham Common in southwest London after the 33-year-old was killed by police officer Wayne Couzens.
As the vigil unfolded, a statement from Ms Nessa’s uncle, Shahin Miah, said the family were “devastated and distraught”.
The statement, read at a side event at the East London Mosque, said: “I appear before you with great sadness. We have no language to speak in these difficult times. There is no room for such suffering.
“We are grateful to all who were injured, protested, sympathized and expressed concern for the safety of women across the UK, not just you, but across the UK.
“All adversity teaches us to be united, gives us the strength to fight against injustice. Sabina is our grief today, Sabina is our courage today.
Community security officers were present at the event, handing out personal alarms to the women.