Surname distribution maps for Degan
Degan in the 1881 Census
Degan in the 21st Century
The maps, if available, show both where there are more people named Degan and where they are most concentrated.
The darker the colour, the more people in that county are named Degan.
The larger the dot, the greater the proportion of people in that county are named Degan.
Hovering over the dots will give you the individual statistics for that county.