Which band had fewer original members, Of Monsters and Men or Jawbox? 
Of Monsters and Men:  The members are lead singer and guitarist Nanna Bryndís Hilmarsdóttir, singer and guitarist Ragnar "Raggi" Þórhallsson, guitarist Brynjar Leifsson, drummer Arnar Rósenkranz Hilmarsson and bassist Kristján Páll Kristjánsson.
i don't know