Henry I of Brunswick-Grubenhagen

Henry I, called the Admirable (1267–1322), was a Welf duke of Brunswick-Lüneburg and the first ruler of the principality of Grubenhagen. The eldest son of Duke Albert the Tall, he governed Wolfenbüttel with his brothers until the 1291 partition, when Henry received Grubenhagen, with Einbeck and Osterode, and made Einbeck his residence.

He quarrelled with his brother Albert over their inheritance, but Albert prevailed and Henry withdrew to Grubenhagen. In 1320 the emperor named him Count Palatine of Saxony, and on his death in 1322 his sons divided Grubenhagen among themselves.