Top surnames in Birmingham from the 1881 British Census

Top surnames by total occurrences

Surname	Total	Frequency	Index
SMITH	4722	1.9231	1.3620
JONES	3523	1.4348	1.2669
TAYLOR	2252	0.9172	1.4342
DAVIS	1663	0.6773	3.0821
WILLIAMS	1644	0.6696	0.9321
BROWN	1354	0.5514	0.8365
EVANS	1330	0.5417	1.2396
GREEN	1168	0.4757	1.6893
BAKER	1155	0.4704	2.1468
HARRIS	1093	0.4451	1.7516

Surname	Total	Frequency	Index
STYCH	54	0.0220	50.6757
DUGMORE	112	0.0456	30.2907
PEARSALL	121	0.0493	24.3947
NEWEY	242	0.0986	24.1739
DOCKER	110	0.0448	22.8173
ADDERLEY	80	0.0326	19.5546
RUSSON	58	0.0236	17.0063
DEELEY	136	0.0554	16.2627
PRITCHETT	90	0.0367	15.3531
MOUSLEY	51	0.0208	15.3222

The Total column shows the total number of people in that county or town with this surname. For example, there were 3523 people called JONES in Birmingham 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 1.4348 in Birmingham means that 1.4348% of the people in Birmingham on census day were called JONES.
The Index column shows the relative probability of finding someone called JONES 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 JONES a if you picked at random from the whole of the UK. If the index is higher than 1, then you are more likely to find someoen called JONES here than if you picked from the UK as a whole, and if 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 JONES here than in the UK as a whole, and 10 would make it ten times as likely. The value of 1.2669 in Birmingham means that you are 1.2669 times as likely to find someone with the surname of JONES in Birmingham than you would be in the whole of the UK.