Is this the same person as Dirk I, graaf van Kinhem ?
Yes it is but I am not sure if we should merge.
I am confident that they are the same because Dirk Gerulf's son, "unknown husband of Gerberge", has a son Graaf Dirk II van Masaland, Kinhem en Texla who is clearly a duplicate of Graaf Dirk II van Masaland, Kinhem en Texla.
Clearly the manager does not think that Dirk II is the son of Dirk I, whether he supports the idea of Dirk Bis we don't know.