Frank Chamberlain was born in Wahroonga, son of Florence Chamberlain of Kintore Street and the late Francis George Baron Chamberlain.
He was at the time of enlistment, a Butcher's Apprentice, educated at Warrawee Public School.
His father's headstone on his grave in the cemetery of St. John's Anglican Church, Gordon, bears tribute to his son "also to his son, Pte. Frank Chamberlain died at Tidworth Military Hospital England 3rd July 1916 18 years – Greater love hath no man than to lay down his life for his friends, Amen".
On the Wahroonga War Memorial, he is shown as having enlisted in 1915.
His name also appears on several honour rolls : Warrawee Public School, that in Turramurra Park, as well as those in St. Andrews Anglican Church Wahroonga, and St. James Anglican Church Turramurra.