Natasha Anderson was born into family violence and lost two of her brothers to suicide when they were aged 18 and 24.
"I am living this experience, it is not a lived experience. This will be with me for the rest of my life," she told the committee on Wednesday.
"I am still experiencing the impacts of those deaths and family members ... will continue to attempt suicide, probably until the day that I die, because of what has happened to us and the failings of the system."
Ms Anderson is a youth advocate on the Victorian government's Victim Survivors' Advisory Council.
She said existing approaches to family violence data collection did not adequately capture suicides that occurred as a result.
"Data is extremely important in these contexts to really understand what is happening for children and young people," Ms Anderson said.
"From my personal perspective, coroner's courts are failing in the way that they presenting what's happening to these young people through their reports."
Research shows exposure to violence can have profound and lasting impacts on children and young people, including increased risk of suicidal ideation.
Young people, particularly those in out-of-home care, should be considered an at-risk group for both family violence and suicide, youth mental health organisation Orygen said.
"Children who have experienced DFSV are almost five times more likely to access mental health services before the age of 18 than their peers," Orygen said in its committee submission.
Ms Anderson's experience of out-of-home care exposed her to further violence which has had a lifelong impact.
"If I had known what my experience would be in out-of-home care, I probably wouldn't have said anything to begin with because of the violence that occurred," she said.
Existing support services to assist people experiencing family violence do not adequately cater to children, Jesuit Social Services chief executive Julie Edwards said.
"(Services have) often been relatively blind to the children who are also victims of that violence, either by witnessing it or directly experiencing it," she said.
"From the moment we've got a problem in a family around violence, we should be thinking about what are we doing for the children (and) the reality is, a support worker might think that but there's not a range of options service options available.
"(Children are often) not actually picked up, it's invisible, and there is a dearth of where would you refer them for help."
1800 RESPECT (1800 737 732)
Lifeline 13 11 14
Men's Referral Service 1300 766 491
beyondblue 1300 22 4636
National Sexual Abuse and Redress Support Service 1800 211 028
13YARN 13 92 76
