Soon after the attack Ms Samuel went to Israel with Moshe and the Holtzberg family requested that she should be able to remain there to continue to care for him.
Mr Yishai said: “She risked her life in order to save Jews and we are obligated to take care of her.
"She is vital to the continuing rehabilitation process, following the terrible disaster they have undergone."
More than 170 people were killed in the attacks at sites across the city, including four Israelis and Jews from America and Mexico.
The Holtzbergs were murdered just days before Moshe’s second birthday.