Family members declined to talk about Catherine, who was 6, but her parents released a statement saying they were "greatly saddened by the loss of our beautiful daughter."
Besides her love for animals, a death notice said Catherine's family will remember her for her constant smile.
Catherine was born June 8, 2006 and is survived by her older brother, Frederick William; her parents Matthew and Jennifer; her grandparents Susan and Leo Sullivan and her great-grandmother Geraldine Russell Holden, all of West Chester, Penn.; Nancy and Earl Hubbard of Chatham, Mass., along with four uncles, four aunts, and nine cousins survive Catherine.
"Her family prays that she, all the students of Sandy Hook Elementary, and all those affected by this brutal event find peace in their hearts," the family said in the obituary.
-- Ken Byron; Washington Post
Chase Kowalski, Age 7
Chase Kowalski loved to be outside riding his bicycle, running or playing baseball, according to his family and neighbors.
He competed in his first triathlon at age 6, according to his obituary. He was a Cub Scout, and was a "fun loving energetic boy that had a true love of life."
Kowalski's family "sends their prayers and thoughts to all of the families involved with this horrific event," the obituary said.
Just last week, he was visiting neighbor Kevin Grimes, telling him about completing — and winning — his first mini-triathlon.
"You couldn't think of a better child," Grimes said.
Grimes' own five children all attended Sandy Hook, too. Cars lined up outside the Kowalski's ranch home Saturday, and a state trooper's car idled in the driveway. Grimes spoke of the boy only in the present tense.
-- Shawn Beals
Nancy Lanza, Age 52
Nancy Lanza, the mother of shooter Adam Lanza, was killed Friday morning before her son shot his way into the Sandy Hook School
According to published reports, Lanza had grown up in New Hampshire, where her brother was a long-time police officer. Officials in Kingston, N.H., described her as a kind, considerate and loving person.
Lanza and her former husband, Peter Lanza, were divorced in 2009, according to court records.
It was not clear what Lanza did for a living and according to reports she was not working at the time of the shooting.
Friends and neighbors in Newtown said Lanza was a kind woman with a good sense of humor who participated in events like Labor Day parades. According to reports, Lanza was interested in gardening and took a special interest in in Christmas lights. She was also a member a group of women who met regularly to play bunco, a dice game.
The Lanzas lived on Yogananda Street, a hilly, affluent neighborhood to the east of town.