Poppo I of Blankenburg

Poppo I of Blankenburg (c. 1095–1161 or 1164) probably came from the House of Reginbodonen and was Count of Regenstein-Blankenburg in the Harz in central Germany.

His uncle, Reinhard of Blankenburg, was the Bishop of Halberstadt,[2] and who probably paved the first steps for him.

His county, which had probably been created by his in-law, Lothair of Supplinburg, was in the eastern Harzgau between the rivers Ilse and Bode.

Record show that Poppo I also had another son called Siegfred, who was noted for witnessing some of the charters of Duke Henry of Saxony and Bavaria, Urkundel HL, nos 48, 52, and 60.

[5] In 1163 as the brother-in-law of the late count, Siegfried IV of Boyneburg, who had died in 1144, he brought certain claims against Northeim Abbey, mediated by his wife, Richenza, before Henry the Lion, who had to uphold them.