"Her passion, however, was her occupation as a behavioral therapist working with children within the autism spectrum," the obituary read.
In lieu of flowers, it asked that donations be made to Autism Speaks, an advocacy organization.
Olivia Engel, 6
Her favorite stuffed animal was a lamb; pink and purple were her favorite colors.
Olivia's family posted a statement on Facebook with those and other details about their beloved daughter.
"She was insightful for her age and had a great sense of humor. She laughed a lot and always lit up a room including the people around her. She was very creative and was always drawing and designing things," her family said.
Olivia took art and dance lessons, played tennis, soccer and swam. She was involved in Girl Scouts and musical theater. She loved school and did well in math and reading.
Her family described her as a "grateful child ... never greedy." Each night, Olivia led grace at the dinner table.
Josephine Gay, 7
Josephine had just celebrated her seventh birthday Tuesday. There's a picture of her on the Web, published in various news stories, that shows her smiling with glasses on the tip of her nose.
Josephine liked to ride her bike and sell lemonade in her neighborhood in the summer, The Wall Street Journal reported. The little girl loved the color purple.
Dylan Hockley, 6
Dylan and his family had just moved from England to Connecticut two years ago.
"We specifically chose Sandy Hook for the community and the elementary school. We do not and shall never regret this choice," Dylan's family said in a statement. "Our boys have flourished here, and our family's happiness has been limitless."
Dylan's family said he loved to cuddle and play tag with neighbors at the bus stop every morning.
"He was learning to read and was so proud when he read us a new book every day," the family said. "He adored his big brother Jake, his best friend and role model."
Dylan's parents also expressed gratitude to the educators who died with their son.
"We cannot speak highly enough of Dawn Hochsprung and Mary Sherlach, exceptional women who knew both our children," the family said. "Dylan's teacher, Vicki Soto, was warm and funny and Dylan loved her dearly. We take great comfort in knowing that Dylan was not alone when he died, but was wrapped in the arms of his amazing aide, Anne Marie Murphy. Dylan loved Mrs. Murphy so much and pointed at her picture on our refrigerator every day.
"Though our hearts break for Dylan, they are also filled with love for these and the other beautiful women who all selflessly died trying to save our children."
Dawn Lafferty Hochsprung, 47