The name Betar בית"ר refers both to Betar (fortress), the last Jewish fort to fall in the Bar Kokhba revolt and to the altered abbreviation of the Hebrew name of the organisation, “Berit Trumpeldor” or “Brit Yosef Trumpeldor” ( ברית יוסף תרומפלדור, Joseph Trumpeldor Alliance), named after Joseph Trumpeldor.[6][7] Although Trumpeldor’s name is properly spelt with tet (ט), it was written with taf (ת) so as to produce the acronym