He married the plump Princess Sophia Charlotte of Mecklenburg-Strelitz in 1761.
In 1848 Glassbrenner entered the political arena and became the leader of the democratic party in Mecklenburg-Strelitz.
She was the eldest daughter of the Duke of Mecklenburg-Strelitz.
In Mecklenburg-Strelitz the corresponding figures are 47, 21 and 10%.
Mecklenburg-Strelitz adopted the constitution of the sister duchy by an act of September 1755.