He is your cousin
He would call your aunt his great aunt. In informal situations, great aunts are sometimes called, simply aunt.
He would call your aunt his great aunt. In informal situations, great aunts are sometimes called, simply aunt.
A nephew is a cousin to his aunt's son.
great nephew
Your son and your aunt's son are first cousins once removed to each other.
Assuming that "his aunts" have reached the age of majority and that "your son" has a passport with the VISAs required by Morocco for citizens of "your son's" country, there should be no issue.
Your aunt's daughter is your first cousin, and her son is your first cousin, once removed.
Aunts.
They'd be your cousin.
to make it easier lets say ' aunts son' so that is your cousin
Your mother's aunt's son is her first cousin and your first cousin, once removed.
In-laws are not related.