Your aunt's great great great grandson is fourth cousin to one of your parents and therefore your fourth cousin, once removed.
it's like your 3rd cousin
Your grandfather's brother's grandson is your great uncle's grandson. The grandchildren of great aunts and great uncles are your second cousins.
Your are related to some of your first cousin's aunts and not to others. The aunts of your first cousin to whom you may be related are your mother and her sisters or your father's sisters. One of the parents of your first cousin isn't related to you, but married into the family. Anyone of your cousins aunts who are related to that person would not be related to you.
yes
Your grandmother's sister is your great aunt. (Some would say grand aunt). Your great aunts' grandchild is your second cousin. Her great grandchild is your second cousin, once removed. .
Your aunt's grandson is the son of your First Cousin and is therefore your First Cousin once removed Ref: http://freepages.genealogy.rootsweb.ancestry.com/~gentutor/chart.html
In-laws are not related.
great nephew
Your aunts and uncles are the sisters and brothers of your parents. So they are "blood related." But you also call the husband of your mother's sister your uncle, and he is not "blood related." So aunts and uncles are not always really related to you.
yes, because you were related to them years on back
Yes, they are related directly to you. They are your mothers sister. And your father's sisters.
Your son and your aunt's child are first cousins, so your son and your aunts grandson (the son of your aunt's child) are first cousins, once removed.