Dr Brendan John Nelson (born 19 August 1958) is a former Australian politician and former federal Opposition leader. He served as a member of the Australian House of Representatives from the 1996 federal election until 19 October 2009 as the Liberal member for Bradfield, a northern Sydney seat.

A doctor by profession, he came to public prominence as the Federal President of the Australian Medical Association (1993–95), and served as a Minister in the third and fourth terms of the Howard Government, serving as Minister for Education, Science and Training (2001–06) and Minister for Defence (2006–2007).

Following the 2007 federal election, at which the Howard Government was defeated, Nelson was elected leader of the federal Liberal parliamentary group in a contest against former Minister for Environment and Water Resources Malcolm Turnbull, and became the Leader of the Opposition on 3 December 2007. On 16 September 2008, in a second contest following a spill motion, Nelson lost the leadership of the Opposition and the Liberal Party to Turnbull.

Saint Brendan of Clonfert or Bréanainn of Clonfert (c. 484 – c. 577) (Irish: Naomh Breandán; Icelandic: Brandanus) called "the Navigator", "the Voyager", or "the Bold" is one of the early Irish monastic saints. He is chiefly renowned for his legendary quest to the "Isle of the Blessed," also called St Brendan's Island. The Voyage of St Brendan could be called an immram (Irish navigational story). He was one of the Twelve Apostles of Ireland.

Saint Brendan's feast day is celebrated on 16 May by Catholics, Anglicans, and Eastern Orthodox Christians.

In 484 Saint Brendan was born in Ciarraighe Luachra near the port of Tralee, in County Kerry, in the province of Munster, in the south-west of Ireland. He was baptised at Tubrid, near Ardfert, by Saint Erc. For five years he was educated under Saint Ita, "the Brigid of Munster", and he completed his studies under Saint Erc, who ordained him priest in 512. Between the years 512 and 530 St Brendan built monastic cells at Ardfert, and, at the foot of Mount Brandon, Shanakeel— Seana Cill, usually translated as "the old church"— also called Baalynevinoorach.