That means that the two individuals share a common ancestor seven generations ago for one and nine for the other. It is a very distant relative.
You do share a common ancestor. You parent would be a fifth cousin one removed. You would be a fifth cousin twice removed.
Your parent's first cousin is your first cousin, once removed. Your parent's first cousin, once removed is your first cousin, twice removed. Your parent's second cousin is your second cousin, once removed. Your parent's second cousin, once removed is your second cousin, twice removed.
The child of your first cousin, once removed, is your first cousin, twice removed, if your first cousin once removed is the child of your first cousin. If your first cousin once removed in the first cousin of one of your parents, the child is your second cousin.
Whether you can marry your first cousin twice removed depends in part on the laws of the place where you propose to have the marriage performed. In most of the US, you can marry your first cousin, so marrying your first cousin twice removed would also be permitted.
Your first cousin's grandchild is your first cousin, twice removed.
You do share a common ancestor. You parent would be a fifth cousin one removed. You would be a fifth cousin twice removed.
Your grandmother's second cousin is also your second cousin, but twice removed. The twice removed means the number of generations between you. Your mother's first cousin is your first cousin once removed. If your mother's first cousin has children, they are your second cousins.
Your grandfather's first cousin is your first cousin, twice removed. His second cousin is your second cousin, twice removed.
Your first cousin's grandson is your first cousin twice removed. Your second cousin's grandson is your second cousin twice removed. Your third cousin's grandson is your third cousin twice removed. And so forth. If your cousin is once removed, twice removed, etc., the relationship possibilities for you and the grandson become more varied and complex.
Your grandfather's first cousin is your first cousin, twice removed. His second cousin is your second cousin, twice removed.
Your first cousin's grandson is your first cousin, twice removed. Your second cousin's grandson is your second cousin, twice removed.
Your grandmother's first cousin is your first cousin, twice removed. Your grandmother's second cousin is your second cousin, twice removed.
Your first cousin's grandsons are your first cousins, twice removed.
The son of your first cousin, twice removed, is your first cousin, thrice (3 times) removed.
Your grandson's third cousin is your first cousin twice removed, and you are hers. You count from the cousin who is closest in generation to the common ancestor in determining what kind of cousin relationship applies.
Your grandfather's first cousin is your first cousin, twice removed. Your grandfather's second cousin is your second cousin, twice removed. Your grandfather's third cousin is your third cousin, twice removed. The relationship possibilities become more complex if you are talking about your grandfather's cousins who are once (or more) removed.
Your grandmother's first cousin is your first cousin twice removed. Your grandmother's second cousin is your second cousin twice removed. And so forth.