Christopher John Brennan (1 November 1870 – 5 October 1932) was an Australian poet, scholar and literary critic.

[2] Brennan entered the University of Sydney in 1888, taking up studies in the Classics, and won a travelling scholarship to Berlin.

There he met his future wife, Anna Elisabeth Werth; there, also, he encountered the poetry of Stéphane Mallarmé.

[7] After Brennan's marriage broke up in 1922, he went to live with Violet Singer, the 'Vie' of his later poems,[2] and, as a result of both his divorce and increasing drunkenness, he was removed from his position at the university in June 1925.

[7] Brennan influenced Australian writers of his own generation and many who succeeded him, including R. D. Fitzgerald, A. D. Hope, Judith Wright and James McAuley.