At least six people were killed and 48 others were injured when the driver of an SUV went through a police barricade and sped into a parade crowd.
It happened Sunday evening in Waukesha.
The victims who died have been identified.
Wilhelm Hospel, 81
Witnesses said Wilhelm (Bill) Hospel was walking in the parade with his wife and handing out water to the "Milwaukee Dancing Grannies."
"I am heartbroken to share my Uncle Bill was one of the victims of the Parade Massacre in Waukesha, WI. My Aunt Lola was one of the Dancing Grannies," his relative wrote on Facebook. "She was injured as well, but will be physically ok. Uncle Bill was the youngest of 4 brothers, all of whom live in the Milwaukee area, though the two oldest escape to FL in the winters. They all would get together a few times a year to catch up and reminiscence."
Bill was born in Germany.
He was also known for helping out at their shows.
Bill is survived by his wife, son, three brothers and other family members.
Virginia Sorenson, 79
Virginia (Ginny) Sorenson was the leader of the "Milwaukee Dancing Grannies."
She was a retired nurse.
Ginny's granddaughter posted a tribute on Facebook in her honor saying, "my grandmother taught me everything I needed to know in life… so happy and proud to be following in her footsteps as a nurse."
She also wrote, "I'll become the best nurse possible in her honor."
"We are absolutely devastated," Sorenson's daughter wrote on Facebook.
"Everyone who knew Ginny knows she had a special soul, one that radiated with love," family members wrote on a GoFundMe page. "Ginny has impacted so many people’s lives, as we continue to remember and grieve her loss, we are profoundly touched by the precious memories she gave so many people. We’ll forever be grateful for having the time we did with her."
Ginny is also survived by her husband, Dave.
Leanna Owen, 71
Leanna (Lee) Owen was a member of the "Milwaukee Dancing Grannies."
She worked as a manager at Packard Glen Apartments for nearly 10 years, according to CNN.
She is survived by several family members.
Tamara Durand, 52
Tamara (Tammy) Durand was also a member of the "Milwaukee Dancing Grannies."
"Tammy was a vibrant, loving and warm woman who we all miss deeply already. Her memory will bring joy to all who knew her," her husband Dave Durand told WISN 12.
She worked as a hospice and critical care chaplain.
According to WISC News, Tammy saved a homeless man from drowning in the Wisconsin River in 2009.
Her husband told The Daily Beast it was Tammy's first time dancing with the other grannies.
"She literally danced her way through life. She was the youngest one in the Dancing Grannies. Dancing was her favorite thing," Dave Durand told The Daily Beast.
Tammy is survived by her husband, nine children and four grandchildren.
Jane Kulich, 52
Jane Kulich was representing her Citizens Bank in the parade.
"Jane was a mother and grandmother who joined the Bank just over one year ago," the bank shared on Facebook. "In that time, she shared her bright spirit with everyone around her. Now we wish to bring support to Jane's family in the wake of this unimaginable loss."
She was also a longtime server at Dave's Family Restaurant in Waukesha.
Jackson Sparks, 8
Prosecutors in Waukesha County said a child died from injuries suffered in the collision.
According to a GoFundMe page, he was identified as 8-year-old Jackson Sparks.
He died Tuesday afternoon at Children's Wisconsin.
Jackson's older brother was also injured and is recovering in the intensive care unit.
He was also survived by his parents.