The Total column shows the total number of people in that county or town with this surname.
For example, there were 238 people called HACKFORD in South Reston at the time of the 1881 census.
The Frequency column shows the percentage of people in this county or town
with this surname. For example, a frequency of 2727.2727 in South Reston means that
2727.2727% of the people in South Reston on census day were called HACKFORD.
The Index column shows the relative probability of finding someone called HACKFORD
in this county or town, compared with the probability of finding them anywhere in Britain as a whole.
An index of 1 means that if you pick someone at random from this county or town, you have exactly the same
probability of picking someone called HACKFORD as if you picked at random from the whole of the UK.
Where the index is higher than 1, then you are more likely to find someone called HACKFORD here
than if you picked from the UK as a whole, and where it's lower then you are less likely. The actual figure
shows the level of probability - for example, a figure of 2 would indicate that you are twice as likely to find
someone called HACKFORD here than in the UK as a whole, and 10 would make it ten times as likely.
The value of 0.24 in South Reston means that you are 0.24 times as likely to find
someone with the surname of HACKFORD in South Reston than you would be in the whole of the UK.