Career
He was also Lord of Neubrandenburg, Stargard, Strelitz and Wesenberg. Ulrich I was probably born before 1382. In 1408, Ulrich and John divided the country.
Ulrich received the Lordships of Neubrandenburg, Stargard, Strelitz and Wesenberg.
He chose Neubrandenburg as his residence. On 19 March 1417, he wrote his will at his Castle in Strelitz.
He died there three weeks later, on 8 April 1417.