Ashlee Good died saving her nine-month-old, who was also wounded in the attack.
The attack is being treated as a "terrorist act".
Pikria Darchia was one of six people killed in the attack.
A 15-year-old has been arrested.
Six people were killed in the attack at Bondi Junction Westfield on Saturday.
The killer's father was out feeding his hundreds of pigeons in the dark.
Commissioner Karen Webb said video of the incident speaks for itself, when asked if the offender targeted women.
She was a Chinese national studying in Australia.
A knife-sharper said the killer came in to have his hunting knives honed, saying he "uses them every day in the house".
