Surname distribution maps for Cogen
Cogen in the 1881 Census
Cogen in the 21st Century
Sorry, we don't have any stats for the distribution of Cogen in the 21st Century.
The maps, if available, show both where there are more people named Cogen and where they are most concentrated.
The darker the colour, the more people in that county are named Cogen.
The larger the dot, the greater the proportion of people in that county are named Cogen.
Hovering over the dots will give you the individual statistics for that county.