Otto III, Duke of Brunswick-Lüneburg

Otto III, Duke of Brunswick-Lüneburg (c. 1296 – 19 August 1352) was Prince of Lüneburg from 1330 to 1352.

The focus of their rule in the early years was the territorial consolidation of the principality.

For example they succeeded in increasing their estate considerably in the area of Gifhorn through the acquisition of the village of Fallersleben and the counties of Papenheim and Wettmarshagen.

Another field of attention was their political support of economically growing towns.

Otto III died on 19 August 1352 without an heir because his only son had already drowned as a child in the River Ilmenau.