“RIP my darling precious gorgeous girl Olivia Campbell taken far far too soon go sing with the angels and keep smiling mummy loves you so much,” Ms. Campbell wrote on Facebook.
Olivia Campbell, from the town of Bury in Greater Manchester, had been a big fan of Ms. Grande, and she was among the legions of mostly adolescent fans who had gone to the concert, some with their mothers in tow.
While Britain has experienced terrorism over several decades, the attack in Manchester was met with particular revulsion because it targeted young people. The Islamic State has said it was responsible.
Those newly identified among the dead included a Polish couple, Angelika and Marcin Klis, from York, England, who had been waiting to collect their daughters from the arena. Their deaths were confirmed by the Polish Ministry of Foreign Affairs.
They had driven their two daughters, Alex and Patrycja, to the concert and were to pick them up afterward. “The kids are safe,” the Polish foreign minister, Witold Waszczykowski, said Wednesday morning.
“Everything is under control,” he said. “One of the girls is underage, so she is being looked after by child services.”
The ministry said that a Polish man had also been injured in the attack and had undergone surgery.
At least two other parents were killed, The Manchester Evening News reported: Alison Howe and Lisa Lees. The two mothers, who were friends, had been waiting outside the arena for their daughters, both 15.
Their daughters were safe, according to news reports. Lee Hunter, Ms. Lee’s brother, paid tribute to his sister on Facebook. “For those who don’t know Lisa is gone but never ever forgotten I love you Lisa I’ll miss you so much,” he wrote. After the attack, desperate family members had turned to social media in search of the women’s whereabouts.
The public relations manager, Martyn Hett, from Stockport in Greater Manchester, had a fondness for tattoos and for the popular British soap opera “Coronation Street.” His death was confirmed on Twitter by a friend, Russell Hayward, and by his brother, Dan Hett.
Martyn Hett was such a devoted fan of “Coronation Street” that he had a tattoo on his leg of one of the show’s characters, Deidre Barlow, who was played by the actress Anne Kirkbride. The tattoo led him to appear on “Tattoo Fixers,” a British reality television series.
His social media posts showed a man with a good sense of humor, who loved to do impressions and dress up as his favorite stars, including as Ms. Kirkbride. He enjoyed the music of Mariah Carey and Michael Bolton. On Instagram, he posted photographs of a gay pride event in Brighton in August 2016, and he described having been a vegan.
On Monday, the day of the concert, he had a glass of prosecco with his friend Stuart Aspinall, before the two went to the concert. Mr. Hett had been planning a trip to the United States, and had been so excited that he had counted down the days on his Facebook page.
The comedian Jason Manford, a family friend, had appealed on social media to try to find Mr. Hett. On Wednesday, Mr. Manford posted a single emoji: of a broken heart.
An earlier version of this article misstated the age of Kelly Brewster. She was 32, not 34.
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