His parents and younger brother were among the dead.
The boy’s aunt Aya Biran was given guardianship over him in the wake of the tragedy.
In September, the child’s grandfather, Shmuel Peleg, visited his relative.
Then he took the child with him IsraelAgainst the wishes of his guardian and her family – a custody battle begins.
judges in Pavia, Italy, has now issued an international arrest warrant in connection with the kidnapping charges of Peleg and Gabriel Abu Paul Alon, who was said to have helped him transport the child to Israel.
The couple allegedly took the boy to Switzerland before taking him on a private jet to Tel Aviv – at a cost of £36,000.
Peleg’s ex-wife, Esther Cohen, is also under investigation.
The grandfather’s lawyers say a counter-petition to the warrant has already been filed.
The Italian court said the mother’s family’s desire to return the child with her to Israel was “the origin of the criminal plan carried out with clear premeditation and meticulous organization by the suspects.”
The judges want the husband to be extradited to Italy.
Italy’s justice ministry said Israel was unlikely to extradite the two, as the Middle Eastern country tends not to extradite its citizens.