 Mielziner married Rosette Levald of Copenhagen in 1861.Of the seven children who survived him, Leo Mielziner was an artist in Paris and Jacob was a rabbi in Helena, Montana.Leo Mielziner would marry Ella Friend McKenna and become the father of five-time Tony Award winning stage designer, Jo Mielziner and of the noted actor and MGM Story Director, Kenneth MacKenna.Source