The Rt Hon Sir Isaac Alfred Isaacs (1855–1948) was a Justice of the High Court from 12 October 1906 to 1 April 1930, a Privy Counsellor from 1921, and the third Chief Justice of the High Court, from 2 April 1930 to 21 January 1931. He joined the Victorian Bar in 1880 and was awarded a Master of Laws in 1883. He was appointed a Queen's Counsel (QC) in 1899.
Isaac Isaacs had another career in politics. He was Member for Bogong in the Victorian Legislative Assembly (May 1892–May 1893, June 1893–May 1901), Solicitor-General in 1893, and Attorney-General 1894–99 and 1900–01. In 1897 he was elected to the Federal Constitutional Convention and from 1901 to 1906 he served in the House of Representatives, including as Attorney-General (1905–06).
Sir Isaac Isaacs was the first Australian-born Governor-General (1931–36).
His civil honours included a Knight Commander (KCMG) in 1928, a Grand Cross of St Michael and St George (GCMG) in 1932, and a Knight Grand Cross of the Order of the Bath (GCB) in 1937.
Although he did not take great part in the affairs of the Jewish community in Melbourne, Sir Isaac Isaacs wrote extensively on biblical and religious subjects for the Jewish press and spoke at various Jewish functions. His contribution to debate on various issues of Judaism was important.