Isabella Sedgwick  [Thomas Sedgwick / Mary Lonsdale]
b. 1852, Collingwood, Victoria1 (#27437)
m. 1867, Robert Prosser1 (#254)

Robert Prosser [Robert Prosser, Unknown Collins] b. Gloucestershire, England

Children:

Emily Jane Prosser
  b. 1868, Collingwood, Victoria1 (#21056)
  d. 1922, CliftonHill, Victoria1 (#4695)
  m. 1890, William Kneebone1 (#7413)
Amelia Prosser
  b. 1870, Collingwood, Victoria
  m. 1895 John Pearce1 (#2201)
Mary Ann Prosser
  b 1872, Collingwood, Victoria1 (#1812)
Robert Prosser
  b. 1874, Collingwood, Victoria1 (#7892)
Hannah Prosser
  b. 1876, Collingwood, Victoria1 (#1793)
Bessy Prosser
  b. 1877, Collingwood, Victoria1 (#14585)
Alice May Prosser
  b. 1879, Collingwood, Victoria1 (#1730)
  m. 1899, William Gavin1 (#8098)
Charles James Prosser
  b. 1886, Collingwood, Victoria1 (#17380)
Sarah Prosser
  b. 1888, Collingwood, Victoria1 (#2114)
Maud Prosser
  b. 1890, Collingwood, Victoria1 (#11628)
  d. 1914, East Melbourne, Victoria1 (#2677)
Frank Prosser
  b. 1892, Preston1 (#35757)
  d. 1964, Heidelberg, Victoria1 (#11566)
  m. 1914, Annie Loughnan1 (#5430)

Sources:

1. Victorian Government Registration Records

Have more data? genealogy@sedgwick.org