Susanne, 

You told me George and Eliza Douglas, from Ireland, had 3 children before setting off to Australia. You thought that you had them coming into Melbourne on the Brig of Hamburgh, Reibersteig 10 September 1852.
I think the the name of that brig might be the 'Reiherstieg' of Hamburg (i.e. not Brig of Hamburgh). Apart from the two named cabin passengers, there were 56 men and 41 women (no mention of children).

See: http://www.shipindex.org/ships/reiherstieg

Hi Suzanne.

Are the people in the documents below your relatives? 

George Dougas & Eliza - New South Wales. Gravestone Transcription Records 1975

George Douglas will 1899

Irish records are very few and far between - you have a difficult job there.

Best regards

The Hamburg brig REIHERSTIEG arrival Melbourne 10 September 1852.

Best regards

Hi Susanne,

That is a really splendid memorial in the Melbourne General Cemetery:

Best regards

The Melbourne General Cemetery is a significant historical site located in Carlton North, Melbourne, Australia.
Opened in 1853, it was the first cemetery in Victoria to be designed as a public park, featuring curved pathways and extensive trees. The cemetery is notable as the final resting place for many prominent figures, including five Australian Prime Ministers and eight state premiers.
But whose is this memorial?

Sorry, I should also have put a link:

https://www.findagrave.com/memorial/191828347/george-j-douglas

Best regards

Hi Susanne.

Could this be your relative?

George Douglas Birth 15th July 1827 Rathfarnham; County of Dublin; Archdiocese of Dublin. 
Father John Douglas, Mother Judith Douglas

https://registers.nli.ie/pages/vtls000633448_100

Best regards

George Douglas marriage to Elizabeth O'Toole 29th June 1851, St. Mary's, Dublin city; County of Dublin; Archdiocese of Dublin.
Witness Alexander Brice & ?? O'Toole

https://registers.nli.ie/registers/vtls000633773?locale=en#page/215...

Best regards

Hi Susanne,

Baptism of Edward Joseph Douglas to George Douglas & Eliz OToole on 13th April 1853 at St. Michan's, Dublin city; County of Dublin; Archdiocese of Dublin

https://registers.nli.ie/pages/vtls000633590_047

If George Douglas was born in 1827 as per the parish record in my previous post, then your earliest Douglas ancestor then becomes John Douglas (+wife Judith) and also it's possible that John's parents are a Richard Douglas and Ann Monk who were married on 16 August 1795 at St. Michan's Catholic Church, Dublin, County Dublin.

Best regards

Hi Susanne,

I think we've come to the point where you may have to make an informed choice (based on your research) as we have two documents which give conflicting information about George's father:

The 1851 marriage record which states his father was called James (see below) and the 1827 birth record which states his father was called John.

I have been unable to find any additional records which support James as the father of George. There are a couple of possible ancestral lines with John as the father.

Best regards