TREE - O'BRIEN

Thomas O'Brien is the earliest relative in Australia (from this branch of the tree). The following images show his descendants (where known).

The following branches show some details of three more of Thomas O'Brien's seven children.

George Cashel O'Brien:

Sarah Ellen O'Brien and William Roberts O'Brien

A fuller tree looks like this:

Thomas O'Brien ( m. Ellen Roberts ) is the father of 7 children and the grandfather of 18 grandchildren. Listed below are details of descendants.

Descendants of Thomas O'Brien (1830s - 1910s) :

1. Ann O'Brien (1860s - 1880s)
2. John Michael O'Brien (1860s - 1950s)
   1. Eugene Terence O'Brien (1890s - 1950s)
      1. Barbara O'Brien (1930s - abt 1990s)
      2. [Colleen]
   2. Ellen O'Brien (1890s - 1940s)
   3. Thomas O'Brien (1890s - 1910s)
   4. Wilfred O'Brien (1890s - 1970s)
      1. John O'Brien (1940s - 2021)
         1. [Michaeley]
         2. Voren 1. [Isobel] 2. [Gabriel]
         3. [Jim (Catherine)] 1. [Rory]
         4. [Bergen] 1. [Joe]
         5. [Kieren] 1. [Oliver] 2. [Olivia]
         6. [Julian] 1. [Thurston]
         7. [Jonathan]
   5. Charles St Clair O'Brien (1890s - 1970s)
      1. [Julie]
   6. Kathleen Mary O'Brien (1900s - 1970s)
   7. John Patrick O'Connell O'Brien (1900s - 1970s)
3. William Roberts O'Brien (1860s - 1920s)
4. George Cashel O'Brien (1870s - 1920s)
   1. Anne May (O'Brien) Moon (1890s - 1970s)
      1. William John Childs (1910s - 1990s)
   2. William Robert O'Brien (abt 1890s - 1950s)
   3. Gerald C O'Brien (1890s - 1920s)
   4. Thomas O'Brien (1900s - 1950s)
   5. Emmet J O'Brien (1900s - abt 1950s)
   6. Maire O'Brien (1900s - abt 1940s)
      1. Peter O'Brien (1920s - 2010s)
   7. Martin Henry O'Brien (1900s - 1960s)
   8. Sara C O'Brien (1910s - abt 1980s)
   9. George John O'Brien (abt 1910s - 1970s)
5. Martin Casey O'Brien (1870s - 1930s)
6. Sara Ellen (O'Brien) Sampson (1870s - 1960s) 
   1. Arthur John Sampson (1890s - 1980s)
   2. Noel Edgar Sampson (1900s - 1970s)
7. Mary Catherine (O'Brien) Mahony (1870s - 1950s)

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A parallel branch of the tree, starting with Thomas O'Brien's brother, William, looks like this:

Descendants of William Cashel O'Brien and Bridget O'Sullivan:

1. John Patrick O'Brien (1870s - 1920s)
2. Margaret Mary O'Brien (1870s - 1940s)
3. William J O'Brien MLA (1880s - abt 1920s)

None of William Cashel's three children married or had children so that branch of the family tree stops here.