Julius Jacob, born 5-May-1876, died 14-Jul-1957 is buried next to Berta Jacob (nee Rheinganum), born 11-Jun-1887, died 5-Jul-1941. She is presumably his wife.
You can do the search yourself from http://www.rookwoodjewishcemetery.com.au/
and view the headstone.
Several files in the National Archives https://www.naa.gov.au/ state that he arrived on the "NIAGARA" on 11-Mar-1939
however, I haven't found Berta's arrival documented. The evidence may be in one of Julius's files, which have not yet been digitized.
I hope this helps,