TREWICK usually belongs to a family from Northumberland in England. Nine members of this family arrived in Victoria in Dec 1855 on the Chariot of Fame

John TREWEEK b abt 1832 d 1889 aged 57 yrs Ballarat East s/o John TREWEEK/Eliza CORNISH [Vic 10744]
John TREWEEK m 1856 Elizabeth FANNING [Vic 2923] b abt 1834 prob Kilkenny, d 1911 aged 77 yrs Ballarat East d/o William FANNING/Bridget LALOR [Vic 281] Twelve known children born Ballarat.
Possible arrival in Victoria was John TREEWEEK aged 21 yrs (b abt 1833) as an unassisted immigrant on the James Carson which arrived at Melbourne in Jul 1854 [PROV Unassisted Immigration to Victoria Index of Inward Passenger Lists for British and Foreign Ports 1852-1911]

David Duncan sent me the 1856 marriage certificate for John TREWEEK and Elizabeth FLANNING (FANNING) who were Wesleyan Methodists married 'in the tent of Mr Treweek' on the Ballarat goldfields. John aged 23, Birthplace: Greensplat (just south of Fernsplat and both very near Gwennap), Cornwall s/o of John TREWEEK, Miner, and Eliza CORNISH.

Walter TREWEEK b abt 1836 Cornwall, d 21 May 1878 aged 42 yrs at Ballarat Base Hospital as a result of a mining accident s/o Walter TREWEEK/Mary PRIOR [Vic 4119]
Walter TREWEEK m 1862 Emily Jane WHITBURN [Vic 2609] Seven known children. Places given are Creswick, Buninyong, Cobblers Gully, Sebastopol and Magpie Gully.

Nicholas (John) TREWEEK bp Cornwall m 1881 Mary Jane WALLIS bp Ballarat [Vic 4016] Possibly Mary Jane WALLIS b 1862 Ballarat d/o Robert/Jane ROBERTS [Vic 232]
Mabel Beatrice Alice TREWEEK b 1884 Sebastopol d/o Nicholas John/Mary Jane WALLACE [Vic 20482]
Mabel Beatrice TREWEEK bp Sebastopol m 1906 Alfred Ernest BENNETT bp Hawthorn [Vic 529]
Daisy Mary Jane TREWEAK b 1888 Sebastopol d/o Nicholas John/Mary Jane WALLIS [Vic 33287]
Daisy Mary Jane TREWEEK d 1888 aged 19 days, Sebastopol d/o Nicholas John/Mary Jane WALLIS [Vic 15544]

TREWEEK families in other parts of Victoria

Joseph William TREWEEK bp Cornwall m 1882 Mary TULK bp Fitzroy [Vic 3663]
Clifford William TREWEEK b 1883 Richmond s/o Joseph William/Mary TULK [Vic 11725]
Elsie Uren TREWEEK b 1884 Richmond d/o Joseph William/Mary TULK [Vic 27140]
Leslie Joseph TREWEEK b 1888 Clif(ton Hill) s/o Joseph William/Mary TULK [Vic 17035]

Thomas TREEWICK (b abt 1809) d 1864 aged 55 yrs, bp England, parents unknown [Vic 5691]

James Manderson TREWEEK d 1857 aged 29 yrs, bp Cornwall, father unknown [Vic 3781] (b abt 1828)
Emma TREWEEK b 1855 Richmond d/o James/Sophia TOMS [Vic 10194] Emma Revel (Reville) TREWEEK m J-D 1873 Thomas NORRIS [Vic 4910] This couple had 8 chn born 1874-87 at Kyneton, Loddon, Castlemaine and Kensington.
Sophia Anne TREWEEK remarried 1858 Henry HOLMAN [Vic 3619] This couple had several children born Campbells Creek, Sanhurst, Inglewood, The Loddon.

George Manderson TREWEEKE bp Cornwall m Louisa Kathleen Sus(an) SMITH bp Launceston [Vic 2509]

Captain Walter TREWEEK arrived Melbourne, Victoria, Australia in March 1857 on the Sardinian. Also on board were James John TREWEEK aged 20 and Maria TREWEEK aged 19 yrs

Francis TREWEEK bp Cornwall m 1871 Elizabeth ROSEWALL bp - [Vic 727]

Joel TREWEEK (b abt 1806) d 1873 aged 67 yrs bp Cornwall s/o Thomas/Peggy HANCOCK [Vic 9191]

There is a gravestone for Joel TREWEEK buried in Gwennap Churchyard who died 30 May 1858 aged 52 yrs. Elizabeth, wife of the above who died 17 Jul 1862 also aged 52 yrs. Joel, son of the above who died ... 1868 aged 29 yrs. Anna Maria, daughter of the above who died ... 1877 aged 35 yrs.

South Australia
Melora TREEWEEK and 3 chn arr 21 Mar 1849 Port Adelaide SA on the ship Pakenham
Passenger list for Pakenham 1849 by Robert Janmaat at The Ships List 1847-1886.
William TREWEEK and Melora had chn: Wm Jnr chr 25 May 1834 St Austell Cornwall, Mary chr 4 Oct 1835 St Austell Cornwall, and Samuel (b abt 1843 Cornwall) d 26 Sep 1927 aged 84 yrs Modbury SA, bur Hay Valley, m 1 Jan 1866 St James Church, Blakiston, SA, Prudence NICHOLLS (b abt 1844 d/o Richard), d 18 Jan 1907 aged 63 yrs Fullarton SA, bur Hay Valley (descendant of Samuel is Basil Gum)
Melora's husband William died on the voyage and she re-married Robert GERRISH (GARISH?) who was supposed to have also been on the Pakenham (although his name is not listed as a passenger). They settled at Gillies Plains and Enfield, then Hay Valley near Nairn SA, then finally to WA.
Robert Hayward GERRISH chr 18 Jan 1818 Broughton Gifford, Wiltshire, England s/o Thomas GERRISH/Mary.

There are several other TREWEEK families which could be added.