Brethren, also called "brothers", are male siblings.

(The) Brethren may refer to:

• Brethren (religious group), any of a number of religious groups
• Brethren (Australian group), an Australian hip hop group
• Brethren, an early name of Lindisfarne (folk rock group)
• Brethren of the Coast, a loose coalition of Caribbean pirates
• Brethren of the Croatian Dragon, a Croatian historical society

• The Brethren or Bratrstvo, an 1899–1908 trilogy novel by Alois Jirásek
• The Brethren (Haggard novel) or Brethren, a 1904 novel by H. Rider Haggard (title depends on market)
• The Brethren: Inside the Supreme Court, a 1979 book by Bob Woodward and Scott Armstrong
• The Brethren (Grisham novel), a 2000 novel by John Grisham
• Brethren (novel), a 2006 novel by Robyn Young
• The Brethren, a 2006 novel by Beverly Lewis
• The Brethren, the 2015 English language title of the 1977 French historical novel Fortune de France by Robert Merle
• Brethren, a book of poetry by Ida Gerding Athens
• The Brethren, a fictional warrior race in the Marvel Comics universe, created by the Celestials

• All pages with titles beginning with Brethren