Konrad VI von Diepholz

In 1285, Konrad V, inherited the rich patrimony of the Lords of Blankena from his cousin, Hermann von Blankena.

from 1177: Gottschalk I from 1219: Rudolf I (until after 1242) and his brother, Cono III (until 1233), sons of Gottschalk I. 1233/42–1265: Johann II, son of Cono III, married Hedwig of Roden, daughter of Hildebold II, Count of Roden and Limmer. 1265-1304: Rudolf II, son of Johann II, co-ruler of Diepholz, married firstly Agnes of Cleves, daughter of Dietrich IV "Nust", Count of Cleves, married secondly Marina, Princess of Sweden, daughter of Valdemar, King of Sweden; died without issue. 1265-1310: 1265–1302: Konrad V, son of Johann II and brother of Rudolf II, co-ruler in Diepholz with his brother, he had inherited the extensive Blankena domains from his cousin, Hermann von Blankena, in 1285, married Hedwig of Rietberg, daughter of Friedrich I, Count of Rietberg. 1310–1350: Rudolf IV, son of Konrad V, married Jutta of Oldenburg-Delmenhorst, daughter of Otto II, Count of Oldenburg in Delmenhorst. 1350–1378: Konrad VII, son of Rudolf IV, married (secondly) Armgard of Waldeck, daughter of Heinrich IV, Count of Waldeck. 1378–1422: Johann III, son of Konrad VII, married Kunigunde of Oldenburg, daughter of Konrad II, Count of Oldenburg in Oldenburg. 1422–1426: Konrad IX, son of Johann II, died in battle at Detern, married Irmgard of Hoya, daughter of Otto III, Count of Hoya. 1426–1484: Otto IV, son of Konrad IX, married Heilwig van Bronkhorst, daughter of Otto, Lord of Bronkhorst. 1484–1510: Rudolf VIII, son of Otto IV, first Noble Lord to title himself Count of Diepholz, relinquished his absolute sovereignty over Diepholz to the Duchy of Brunswick-Luneburg in return for its protection, married Elisabeth of Lippe, daughter of Bernhard VII "Bellicosus", Noble Lord of Lippe. 1510-1514: Co-Lordship of the brothers Friedrich I, Johann VI and Konrad XII, sons of Rudolf VII; the brothers signed a treaty in 1514 allocating sole rule to Friedrich I. 1510-1529: Friedrich I (as sole Noble Lord / Count), married Eva von Regenstein, daughter of Ulrich VIII, Count of Regenstein and Blankenburg. 1529–1545: Johann VI, brother of Friedrich I, his use of the title of Count of Diepholz was generally recognised, he seized the county after the death of his brother and ruled as sovereign count during his nephew's minority. 1545–1560: Rudolf IX, son of Friedrich I, married Margarete of Hoya, daughter of Jobst II, Count of Hoya in Nienburg. 1575–1585: Friedrich II (1560–1575), son of Friedrich I, married Anastasia of Waldeck; their only daughter could not by dynastic law inherit the county, which therefore fell to the Duchy of Brunswick-Luneburg.