The first victim identified by his family was 76-year-old grandfather Nicholas Toledo.
The New York Times reported that Toledo, who used a wheelchair, did not want to participate in the parade but had to stay with his family because of his disability.
Toledo was in his wheelchair when he was killed. We were all shocked, Zochel Toledo, his granddaughter, told the Times.
"We thought it was part of a parade we realized our grandfather had been killed. We saw blood and everything fell on us.
Another victim was named Jackie Sandham by a local synagogue. North Shore Congregation Israel confirmed to local media that Sandhim was a lifelong collective and staff.
In a statement, the synagogue said: "Our beloved Jackie Sandham was one of the victims of the Highland Park Parade.
It added: "Jackie's work, kindness and warmth have impressed us all, from his early days teaching at Gates of Learning Preschool to the joys of life as our events and Bani Mitzwa coordinator.
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And to guide us innumerable times in times of sorrow - all this with relentless devotion;