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Yes, it is possible to personalize the names of columns in an abstract domain class using Grails. This can be done by using the static mapping block in the domain class and specifying a column attribute for each property that needs to be customized.

For example, suppose we have an abstract domain class Person:

abstract class Person {
    String firstName
    String lastName
}

If we want to customize the column names for firstName and lastName, we can do it like this:

abstract class Person {
    String firstName
    String lastName

    static mapping = {
        firstName column: 'first_name'
        lastName column: 'last_name'
    }
}

This will create columns named first_name and last_name in the database table for each subclass of Person.