Elizabeth Brentnall (née Watson; 18 September 1830, Nottingham, England – 30 April 1909, Brisbane, Australia)[1] was an Australian suffragist, temperance activist and philanthropist.

[8][2] The Brentnalls served Wesleyan Methodist congregations for seven years in Sydney, Mudgee and Windsor, New South Wales, before settling in Queensland in 1873.

[11][12] Brentnall's membership of the Wesleyan Methodist church indicates that her faith motivated her leadership in the suffrage and temperance movements and in social reform.

As a minister's wife, Brentnall was vice-president then president of the Wesleyan Home Mission Society Ladies Auxiliary in Queensland and continued in that role even after Frederick resigned from his ministry in 1881.

[2] A mission activity meant the union should pursue social action to achieve a goal, in this case women's right to vote.

[15][13][16] Most of Brentnall's WCTU activities aimed to benefit women and children, reform legislation and mitigate the effects of alcohol on families and society.

[1] Frederick Brentnall opposed votes for women even as member of the legislative council and wanted male franchise retained only for property owners.

Many could recall the high tone of spirituality that pervaded the society at the outset, imparted to it by the lofty ideal that was in the mind of their late sister...Being a woman of large heart she had cultivated a world-wide sympathy, was throughly cosmopolitan in her outlook upon life, and her influence would live on.

[30] Flora, first as Miss Brentnall then as Mrs EB Harris, was appointed organiser in 1890[32] of the Young Woman's Christian Temperance Union (known as the "Y') and president of the Queensland WCTU in 1902.