There are at least six artists named Ahab;
These are photos from concerts where Ahab played, so they may be of other bands that played the concert as well.
Ahab / Officium Triste / Witchsorrow / The Drowning / Faal / Eye of Solitude Nov 17, 2012 Islington, England, United Kingdom Uploaded by Gore Crazy
Bestival 2012 Sep 6 - 9, 2012 Downend, Isle of Wight, UK Uploaded by A Badger Faced Man
Cambridge Folk Festival Jul 26 - 29, 2012 Cambridge, England, United Kingdom Uploaded by Craig Hatfield
Roy Harper
Clannad
Joan Armatrading
Billy Bragg
Guilfest 2012 Jul 13 - 15, 2012 Guildford, England, United Kingdom Uploaded by Craig Hatfield
Buzzcocks
Tim Minchin
Jimmy Cliff
Mr B the Gentleman Rhymer
Nouvelle Vague