You can refer to the members of a particular organization or group, especially a religious group, as brethren.
[old-fashioned]
We must help our brethren, it is our duty.
They prayed for their brethren still living under persecution.
brethren in British English
(ˈbrɛðrɪn)
plural noun
1. archaic a plural of brother
2.
fellow members of a religion, sect, society, etc
brethren in American English
(ˈbrɛðrən; often, ˈbrɛðərn)
plural noun
brothers
now chiefly in religious use
Word origin
ME bretheren, pl.: see brother
Examples of 'brethren' in a sentence
brethren
Come out or come back home and join our happy brethren in the task of rehabilitation.
Dexter Petley WHITE LIES (2003)
"You can deny yourself, Brak, but you cannot deny the brethren.
Jennifer Fallon TREASON KEEP (2003)
They deck themselves in feathers and fur, including the skins of my brethren.
Tepper, Sheri S. A PLAGUE OF ANGELS (2003)
All related terms of 'brethren'
bro
a close male associate
brother
Your brother is a boy or a man who has the same parents as you.
Open Brethren
one of the two main divisions of the Plymouth Brethren that, in contrast to the Exclusive Brethren, permits contacts with members outside the sect
Elder Brethren
the senior members of the governing body of Trinity House
Bohemian Brethren
a Protestant Christian sect formed in the 15th century from various Hussite groups, which rejected oaths and military service and advocated a pure and disciplined spiritual life. It was reorganized in 1722 as the Moravian Church
Exclusive Brethren
one of the two main divisions of the Plymouth Brethren , which, in contrast to the Open Brethren, restricts its members' contacts with those outside the sect
Plymouth Brethren
a religious sect founded c. 1827, strongly Puritanical in outlook and prohibiting many secular occupations for its members. It combines elements of Calvinism , Pietism, and millenarianism , and has no organized ministry
Trinity Brethren
the members of Trinity House
German Baptist Brethren
a Protestant sect founded in 1708 in Germany but who migrated to the US in 1719–29, the members of which (Dunkers) insist on adult baptism by total immersion
baby brother
a younger brother
half-brother
Someone's half-brother is a boy or man who has either the same mother or the same father as they have.
kid brother
your younger brother
lay brother
a man who has taken the vows of a religious order but is not ordained and not bound to divine office
Church of the Brethren
a Protestant sect founded in 1708 in Germany but who migrated to the US in 1719–29, the members of which (Dunkers) insist on adult baptism by total immersion
blood brother
A man's blood brother is a man he has sworn to treat as a brother, often in a ceremony which involves mixing a small amount of their blood.
foster brother
a boy brought up with another child of different parents
Dunkers
a sect of German-American Baptists opposed to military service and the taking of oaths