Hi there,
I am not related to the Richard RICHARDSON who Ros has found on the electoral roll at Strathfield, BUT .... I can confirm that there's more than a few chaps born back in the 1890s who were living in the Sydney metro areas for many decades in the 20th Century, as I am related to several. There's a father/son and uncle/nephew naming pattern in 'my' Dick Richardson families.
The various state/territory and Commonwealth Electoral Rolls are not the equivalent of say the UK or USA Census. They are not issued by household order. They do not give the age of the elector, nor their marital status, nor the names of others in the household who are not old enough to enrol, and if there are others in the household with a different surname then those electors are found elsewhere in the rolls, listed under their own surname.
Cheers, JM