Hermann I of Hesse

Hermann I the Elder of Hesse (after 1305–1368/1370) was the youngest son of Landgrave Otto I of Hesse and Adelheid of Ravensberg. In 1326 he was offered a church prebend at Avignon, but renounced an ecclesiastical career. When his brother Henry II succeeded in 1328, he received Nordeck Castle as his apanage, adding Grebenstein Castle in 1349.

After his nephew Otto the Younger died in 1366, he did not claim the landgraviate. He died between July 1368 and July 1370, leaving no issue.