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