Rudolf IV von Diepholz

1310–1350: Rudolf IV, son of Konrad V, married Jutta of Oldenburg-Delmenhorst, daughter of Otto II, Count of Oldenburg in Delmenhorst.

Rudolf IV, succeeded his father as sovereign of Diepholz in 1484, thanks to the premature death of his older brother, Konrad XI (died 1483), who had left progeny by an unknown partner. Konrad XI's son, Otto von Diepholt, married the Frisian noblewoman, Anna Remets Ubbena, sister of Dr. Hayo "Hermannus Phrysius" Hompen, humanist scholar, Imperial Councillor and correspondent of Erasmus,[35] and half-sister of Wilhelm Ubbena, Chancellor of East-Frisia.[36]

Konrad V's son, Rudolf IV (cited 1300-1350), continued to actively extend his possessions by his forceful and considered interventions during a very tumultuous period in the region.[17] In 1350, together with his sons and grandchildren, he founded the parish church of Diepholz (which had previously been in Drebber), which he dedicated to Saints Nicholas, Catherine and Elisabeth.[18]

Nieberding, C.H., Geschichte des ehemaligen Niederstifts Münster und der angränzenden Grafschaften Diepholz, Wildeshausen, etc., Vechta 1840 (reprinted 1967), p. 125.