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