How to get distinct list of object with concat in Java 8

I have 2 Java Classes.

class A {
 String name;
 List<B> numbers;
}

class B {
 Integer number;
}

I want to get the distinct of Class A and concat the List of B in it.

e.g. Suppose I have a List with the following objects.

List<A>{
 name = "abc"
 List<B>{1,2}

 name= "xyz"
 List<B>{3,4}

 name = "abc"
 List<B>{3,5}
}

The result should be:

List<A>{
 name = "abc"
 List<B>{1,2,3,5}

 name="xyz"
 List<B>{3,4}
}

Any help would be appreciated.

Note: I want to achieve this functionality using Java 8 streams.

Thanks