"Israel is investigating the incident and remains committed to protecting civilians and holy sites."
The dead were named by the Latin Patriarchate of Jerusalem as Najwa Abu Daoud, Saad Issa Kostandi Salameh and Foumia Issa Latif Ayyad.
The church is the only Catholic place of worship in the Strip. Pope Leo said at the time that he was "deeply saddened to learn of the loss of life and injury caused by the military attack".
On the donation, the AJC's CEO Ted Deutch said in a statement: “We are deeply saddened by the deaths, injuries, and structural damage at the Holy Family Church in Gaza and stand in solidarity with our Catholic brothers and sisters.
"We pray for the full recovery of the injured and the safety of all peoples affected by the devastation of war.”
And AJC’s director of inter-religious affairs, Rabbi Noam Marans added: “Together, as Christians and Jews, we can affirm the shared humanity of all.”
“In the wake of this tragedy, we want to be there for Catholic partners who have been there for the Jewish people in our times of need.”
The archbishop of New York Timothy Dolan has welcomed the donation, saying: “We appreciate AJC’s expression of consolation and support and are thankful for the opportunity to do good as Jews and Catholics together in this way, to bring some light to the darkness of war."