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.
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.
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.
Your first cousin's grandchild is your first cousin, twice removed.
There is no such thing as any kind of cousin removed by any amount of percent. "First cousin 23 percent removed" is simply nonsense. You could have a first cousin twice removed, or three times removed or 23 times removed. You first cousin is the child of you aunt or uncle. You first cousin once removed is the child of your first cousins, three times removed is the grandchild, etc. But remember that you are the first cousin once removed to the child of your first cousin. So you also can have a first cousin once removed who is the first cousin of your parent; a first cousin twice removed who is your grandparent's first cousin, etc.
The child of your first cousin oncer removed is your first cousin twice removed, or your second cousin, depending on which end of the relations you are on..
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 grandfather's first cousin is your first cousin, twice removed. His second cousin is your second cousin, twice removed.
The son of your first cousin, twice removed, is your first cousin, thrice (3 times) removed.
Your first cousin's grandsons are your first cousins, 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 granddaughter and your first cousin are first cousins, twice removed, to each other.
The child of your first cousin twice removed is your first cousin thrice (three-times) removed, or your second cousins, once removed.
The nephews of your first cousin once removed, like the children of your first cousin once removed, are your first cousins 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.
Yes, your first cousin twice removed is still related to you.