Complex sentence: His father, Kálmán Seinfeld (1918--1985), was a sign maker of Austrian and Hungarian Jewish descent; his mother, Betty (née Hesney; born 1915), is of Syrian Jewish descent; her family lived in Aleppo.
Split into simpler sentences: His father, Kálmán Seinfeld (1918--1985), was a sign maker of Austrian and Hungarian Jewish descent. His mother, Betty (née Hesney; born 1915), is of Syrian Jewish descent; her family lived in Aleppo.