Complex sentence: A liaison with Anna Benzerath resulted in Peter Ernst II von Mansfeld, 1580-29 November 1626, near Sarajevo, who was his best known descenant,, an important army commander in the Thirty Years War.
Split into simpler sentences: A liaison with Anna Benzerath resulted in Peter Ernst II von Mansfeld, 1580-29 November 1626, near Sarajevo. His best known descendant was his illegitimate son Ernst von Mansfeld, an important army commander in the Thirty Years War.