first officer aboard a goblin warship the isle of uisgebeatha duke amin giantslayer , duke of the isle of uisgebeatha farg giantslayer , first born son , nineteen dorla giantslayer , duke amins niece , sixteen neafon damfury , duke amins sergeant of arms tumorg rockeater , sergeant of duke amins sapper unit baelock swordbeater , duke amins metal smith .