I also have Ketley's in my family tree from the same areas.My line starts with John Ketley married 1763 Little Waltham, Essex to Hannah Collins - they had: Elizabeth, James, Ann, Robert, John, Martha, William, Benjamin.
I descend from their son Benjamin born Little Waltham 1784-1853 married 1806 Little Waltham, Essex to Elizabeth Cockerton d1834 - they had: Ann, John, Joseph, Hannah, William, Mary, James, Elizabeth, Sarah, Susannah,Samuel, George.
I descend from their son William born Little Waltham 1814-1897 married 1838 Chelmsford, Essex to Lucy/Louisa Algar 1818-1874 - they had: William, Ellen, Hannah, Charlotte, John, Ruben, Washington, Benjamin, Susannah, Emma.
I descend from their son William born Great Leighs, Essex 1840 died 1914 Camperdown NSW married 1876 Waterloo, NSW to Emma Cheeseman 1847-1939 - they had: Florence, William, Winifred, Rosie, Elsie, Ruby.
Their eldest daughter Florence 1877-1946 married John Henry Sherwood and they were my great grandparents.
If you think our families are connected I would be happy to exchange information.