Helmold III, Graf von Schwerin

https://en.wikipedia.org/wiki/Helmold_III,_Count_of_Schwerin

Helmhold III, Count of Schwerin (died 1295) was a German nobleman. He was a son of Count Gunzelin III of Schwerin-Boizenburg and Margaret of Mecklenburg. Helmhold III was the ruling Count of Schwerin-Neustadt and Marnitz from 1274 until his death.

Marriages and issue Helmold married twice. His first wife was Mathilda (some sources call her Margaret; d. 1265), a daughter of Albert I, Duke of Saxony. Together, they had three children:

Gunzelin V Henry III Margaret, a nun in Zarrenthin Abbey After Mathilda's death, Helmold married Margaret, the daughter of Eric I, Duke of Schleswig. This marriage remained childless.

https://de.wikipedia.org/wiki/Helmold_III._(Schwerin)

Helmold III. († 1299 ?) war Graf von Schwerin.

Von Helmold III. sind drei Ehen bekannt:

⚭ I) (N.N.), Gräfin von Dannenberg ⚭ II) Mechthild; ⚭ III) 1264 Margarete von Schleswig († um 1315), Tochter des Erich I. von Schleswig Sohn aus erster Ehe war Gunzelin V. († nach 1307), 1296–1307 Graf zu Schwerin; Sohn aus dritter Ehe war Heinrich III. († 1344), 1296–1307 Graf zu Schwerin, Boizenburg und Crivitz 1298–1344

http://fmg.ac/Projects/MedLands/MECKLENBURG.htm#HelmoldIIISchwerindied1297