@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "SomeType")
public class SomeType {

    @XmlAttribute(name = "Name")
    protected String name;
}

public interface SomeTypeRepository extends CrudRepository<SomeType, Long> {

    SomeOtherType findByName(String name);

}

@Entity
public class SomeOtherType extends SomeType{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
}

@Entity
public class SomeOtherType extends SomeType{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    protected String name;
}