William G Sedgwick  [parents unknown]
b. est 1830
m. England? Charlotte Sedgwick (cousins?)
lived New South Wales

Charlotte Sedgwick  [parents unknown]

Children:

William Sedgwick
  b. 1855, Newtown, New South Wales1 (#V2082-44A)
  d. 1919, St Leonards, New South Wales1 (#25309)
  never married
Lucy Sedgwick
  b. 1856, Glebe, New South Wales1 (#2748)
  m. 1879, New South Wales, Alfred Allen1 (#1750)
John Sedgwick
  b. 1857, Chippendale, New South Wales1 (#2719)
  d. 1857, New South Wales1 (#1467)
George Sedgwick
  b. 1860, Newtown, New South Wales1 (#2857)
  d. 1942, Adelong, New South Wales1 (#15043)
  never married
Alfred Sedgwick
  b. 1863, Newtown, New South Wales1 (#2693)
Grace Sedgwick
  b. 1865, Newtown, New South Wales1 (#2826)
  m. 1888, New South Wales, Oswald Morton1 (#2830)
Charles Sedgwick
  b. 1867, Newtown, New South Wales1 (#2982)
Edward Sedgwick
  b. 1869, Newtown, New South Wales1 (#3296)
  m. 1894, New South Wales, Eliza Fitzpatrick1 (#659)

Sources:

1. New South Wales Government Registration Records

Have more data? genealogy@sedgwick.org