Duke of Lauenburg
The title of Duke of Lauenburg derives from the Duchy of Saxe-Lauenburg , which , since its foundation in 1269 , was ruled in succession by 29 dukes from six dynastic houses and lines , and by an additional four dukes from a temporary dynastic branch line ( Anna Maria Franziska of Saxe-Lauenburg , the first would-be duchess regnant , was kept from inheriting the duchy by male rulers of neighbouring states ) . 
<triplet> Duke of Lauenburg <subj> Duchy of Saxe-Lauenburg <obj> applies to jurisdiction