Which early Habsburg ancestor may have been Count Guntram who rebelled against Otto I?

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Stone ruins of Habsburg Castle, also known as Habichtsburg, stand on a hill above green vineyards in Aargau canton, Switzerland, with a flag flying atop the tower. — House of Habsburg Ruins of the castle of Habsburg, or Habichtsburg (“Hawk's Castle”), built 1020, the original seat of the house of Habsburg, Aargau canton, Switzerland.

The earliest traceable ancestor of the House of Habsburg is Guntram the Rich. Historical records suggest that he may indeed be identified as the same Count Guntram who led a rebellion against the German king Otto I in 950 CE.1