Bertold I, Graf von Hohenberg - His mother is suspect

Her name Hedwig von Ren is very suspiciously close to Hedwig von Buren, who is the wife of Burchard von Hohenzollern.

Burchard I von Zollern, Graf

Hedwig von Büren, Gräfin von Zollern

Now, the question is whether Burkhard, Graf von Stauffenberg and Burchard I von Zollern are the same person. This Wikipedia article mentions that an attempt has been made to link them, but has failed:

https://en.wikipedia.org/wiki/Burkhard_I,_Lord_of_Zollern

And in the Wikipedia article, it is strongly speculated that Burchard I von Zollern is the son of Friedrich von Sülichen and Hedwig von Büren, which is what the Geni profile has them as.

Thus, it is my conclusion that Hedwig van Ren as the mother of Bertold I "der ältere" von Hohenberg is totally wrong, and should be replaced by UNKNOWN.