Julius Heinrich, son of Gottlieb Ernest and Johanna Christaine (née Klemke) Rau was born in Germany on 12 February 1839. He married Augustine Wilhelmine Boehm in 1862. They had the following children:
Oscar Reinheld — born in 1866 at Germantown, married Anna Christine Elizabeth Baum on 28 May 1901 at the Lutheran church, Germantown
Emma Amelia — born in 1862, died in 1918
Ottilee Bertha — born in 1864, died in 1900
Auguste Juliane Ida — born on 5 September 1868, married Rudolph Adolf, divorced in 1913, married James Mcvay in 1914, died on 19 November 1942 aged 73 at South Yarra
Frank Julius Otto — born on 19 December 1872 at Germantown, married Louisa Martha Baensch in 1896, died in 1943, aged 70
Julius was a vigneron in Grovedale. In 1887 he was elected a member of the Board of Advice for the School District of South Barwon. In 1891 he became a South Barwon Shire councillor, serving until 1896. He was a trustee for land set aside for the Lutheran Church at Grovedale.
Julius died on 20 May 1897 aged 58 years at Grovedale. He was buried at Grovedale Cemetery. Augustine died on 27 May 1912 aged 69 years at Geelong. She was buried with Julius at Grovedale.