Lawyers for a man accused of carrying out a fatal shooting at Sydney's Bondi Beach on Monday sought a court order to prevent the media from naming his family, saying their safety was at risk.
Police allege Naveed Akram, 24, opened fire at a Jewish Hanukkah celebration on December 14, killing 15 people, in Australia's worst mass shooting in decades.
His father, Sajid Akram, who police also accuse of carrying out the shooting, was shot dead by police at the scene.
Police say the men were inspired by the Daesh militant group to carry out the attack using several high-powered weapons that the elderly man had acquired legally.
Naveed Akram's lawyers asked a Sydney court on Monday to ban the publication of the names of his mother, brother and sister, as well as their home addresses, places of work and studies.
Magistrate Greg Grogan extended a provisional suppression order until next month, citing global media interest in the case.
Akram faces a total of 59 charges over the attack, including 15 counts of murder, 40 counts of wounding with intent to murder and one terrorism offence. He has not yet pleaded guilty.
The case is expected to briefly return to court next week, before a longer hearing on April 8, where the prosecution will outline its brief of evidence.
The Bondi attack shocked a country with strict gun laws and fueled calls for tighter controls and stronger action against anti-Semitism.
Australia last month launched a government-backed inquiry into antisemitism and social cohesion in the country, which is expected to report its findings in December this year.
The government has already responded by tightening gun laws and introducing new legislation against hate speech.
