Alexander James Webster was born in Launceston on 17 May 1866, the eldest son of Alexander Webster (1819-1907) and his second wife Rachel Kilpatrick Tillery Allan. Alexander senior came from Edinburgh, Scotland, in 1840. He was employed as an ironmonger with Thomas Corbett for six years. He then ran his own business until 1888 when he joined J C Ferguson and Company. He was an alderman and mayor of Launceston, a territorial magistrate and involved with the music and Sunday School of the Presbyterian Church. Alexander senior and his first wife Mary Kirk had three sons and five daughters. After Mary's death in Mar 1858 Alexander married Rachel Allan. They had four daughters and four sons.
In Dec 1892 Alexander James Webster disposed of his chemist business in Charles Street, Launceston. He married Emmaline Eliza Dodery at Christ Church, Longford, on 18 Apr 1893. Emmaline was the fifth daughter of the Hon. William Dodery MLC and his wife Mary Webb of 'Lauraville', Longford. The couple moved to Sydney after their marriage where Alexander pursued his profession as a chemist. Alexander died in 1939 and Emmeline passed away in 1941, both at Chatswood, NSW.