Your great grandmother's first cousin is your first cousin three times removed.
Your great uncle's granddaughter is your second cousin.
You and your first cousins share the same Grandmother.
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
There is no relationship in the English language that is called a "half cousin." Everyone who is your cousin is related to you through one and only one parent, so, unlike a "half brother" there can be no such thing as a "half cousin." If you have a first cousin (child of your aunt or uncle), then your child and that first cousin are first cousins once removed. If you have a second cousin, they your child and that second cousin are second cousins once removed.
Your first cousin's daughter is first cousin once removed to your grandson, and he to her. Your second cousin's daughter is second cousin once removed to your grandson, and he to her.
If it is your first cousin, they are your first cousin once removed.
Your first cousin's child is your first cousin once removed.
Your first cousin's granddaughter is your first cousin, twice removed.
You mother's first cousin is your first cousin, once removed.
Your first cousin's daughter is your first cousin, once removed.
If you are first cousins, they would be a first cousin once removed.
The child of your father's first cousin is your second cousin.
No. It's prudent to not be in a relationship with a first cousin.
Your cousin's daughter is called your first cousin, once removed. Although the term "second cousin" is sometimes used for this relationship, it is technically incorrect.
first cousin twice removed
The offspring of your first cousin is your first cousin once removed.
Your third cousin.