Johann IV Von Mecklenburg-Schwerin
Johann IV Von was born on June 16th, 1377.  He died at the age of 45 in 1422.

 Katharina Von Sachsen-Lauenburg
Katharina Von was born about 1380.  She died on July 23rd, 1448.

 Heinrich II (IV) Von Mecklenburg-Schwerin
Heinrich II (IV) Von was born about 1417.  He died on March 9th, 1477.