I would have following tables
In PersonRelation I would have following fields
Then I can have a relationship go from Person to PersonRelation to Person, meaning kid to PersonRelation to parent
Then you when you are involving school you should think twice if you need to have history of class and other information.
If Person goes to School it goes to Class that have x Teachers.
Then you can have Class for each year holding Person and have history kept for each year.
I also suggest you to read the free FileMaker Training Series
so you mean i don't need to separate the person table into two?
Much better to have all Person in the same table