The Total column shows the total number of people in that county or town with this surname.
For example, there were 20,626 people called BLEASDALE in Lancaster 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 112.3062 in Lancaster means that
112.3062% of the people in Lancaster on census day were called BLEASDALE.
The Index column shows the relative probability of finding someone called BLEASDALE
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 BLEASDALE 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 BLEASDALE 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 BLEASDALE here than in the UK as a whole, and 10 would make it ten times as likely.
The value of 20.63 in Lancaster means that you are 20.63 times as likely to find
someone with the surname of BLEASDALE in Lancaster than you would be in the whole of the UK.