Seven-year-old Julian Cadman was separated from his mother during the Barcelona terror attack.
A van was driven into crowds on Las Ramblas in Barcelona on Thursday.
Another Italian was among the dead and three were injured, officials in Rome said.
After Ciutat de la Justicia, Andrew was expected to next go to the hospital where his wife is being treated for serious injuries.
Other family members are also at Jom's bedside, it is believed.
Foreign Affairs Undersecretary for Migrant Workers Affairs Sarah Arriola said the woman was with her son in Barcelona to attend the wedding of a cousin from the Philippines.
"I was at her side helping her, telling her, 'be calm, don't worry", Fouad Bakkali told the newspaper. "She was always positive", team President Arnould Partoens told The Associated Press over the phone, adding that the team planned to hold one minute of silence to honor her memory before every practice and game this weekend. She's just having a really hard time. Martina had one-year-old Aria in a baby carrier and managed to pull her son out of the way too.
I must return to Atletico Madrid: Chelsea's Diego Costa
Last season we did a fantastic job because there wasn't this foundation or basis. For this reason the fans must be happy.
As Barcelona came back to life yesterday in defiance of the attackers, the Foreign Office said that a "small number" of British nationals were injured while Spanish authorities said that fewer...
A family friend, known only as Scott, told Sydney's 2GB Radio that the child's father, who had stayed behind in Australia, learned of the terrorist attack shortly after arriving at work.
"I think we should all, in a our quiet moments, say a prayer for that little boy", Turnbull said.
ABC News in Australia said Julian Cadman was separated from his mother in the confusion.
Mr Cadman is understood to be British, and Julian - a student at St Bernadette's Primary in Lalor Park - may have dual citizenship by descent, according to media reports.
Citizens from at least two dozen countries have been injured or killed in the van attack in the Las Ramblas area of Barcelona and the coastal town of Cambrils, The Guardian reported quoting the Catalan authorities.
The Queen said in her message to King Felipe: 'Prince Philip and I send our honest condolences to Your Majesty, and the people of Spain, following the awful terrorist attacks in Barcelona and Cambrils which killed and seriously injured many.