Hi Barry,
do not know how you work out name of Gawthrop.
The information is what I have found looking at various family trees on Ancesty.
Name: Henry Gawthroup Birth: Abt 1833 - Histon, England Death: 02 Dec 1871 (2 Dec 1871) - Warialda, New South Wales, Australia Marriage: 17 Oct 1853 - Histon, Cambridgeshire, England Parents: James Gawthroup, Sarah Ann Norman Spouse: Eliza Robinson.
The above are the parents of Esther and brothers & sister below[i haven't listed all of them]. Most appeared to have changed their name to Goldthorpe, indeed Henry Gawthroup's name is listed as Gawthringh arriving on the Columbia in 1854. Henry is is reported to have died from a fall from a horse 1871.
http://trove.nla.gov.au/ndp/del/article ... Term=Henry Gawthrop warialda#pstart137874
.....Miss Mary Gawthrop, formerly of Warialda, please Send Your Address once to Mr. James Bowman, of near Warialda.... Mary Gawthrop [Golthorpe] had three children to an unknown male all of the children were named Goldthorpe. Mary married William Bowman in 1878.
Name: Alfred Gewthorpe Birth Date: 1864 Father's Name: Henry Gewthorpe Mother's Name: Eliza Birth Place: New South Wales Registration Year: 1864 Registration Place: Patricks Plain, New South Wales Registration Number: 13163
13357/1866 Gawthrop Charles, Parents - Henry & Elizabeth, Patick Plains.
2267/1893 Goldthorpe Charles m. Ann Gaurdern, Bingara.
Death: 13710/1935 Goldthorpe Charles 75 yrs, Barraba.
While charles was registered as Gawthrop he changed his name when married .
barry.