------ parent.sls ------
{% set last_name = 'my_last_name' %}
{% set full_name = name + last_name %}

------- child.sls ------
{% set name = 'my_name' %}
{% include "parent.sls" %}

------ first.sls -----
{% set uber_name = 'this is my full name: ' + full_name %}

------ last.sls ------
{% include "child.sls" %}
{% include "first.sls" %}

parent.sls can't find "name" when state.sls is called uppong last.sls