The children of your mother's first cousins are your second cousins.
The children of your mother's second cousins are your third cousins.
The children of your mother's third cousins are your fourth cousins.
And so forth.
Your mother's 1st cousin's child is your 2nd cousin.
Your mother's 2nd cousin's child is your 3rd cousin.
And so forth.
The children of your mother's first cousins are your second cousins.
The children of your mother's second cousins are your third cousins.
And so forth.
The children of your mother's first cousin are your second cousins.
Your mother's first cousins are your first cousins, once removed.
The children of your mother's first cousins are your second cousins, of your mother's second cousins are your third cousins, etc.
I think they are you cousins once removed
The children of your mother's first cousins are your second cousins. The children of your mother's second cousins are your third cousins. And so forth.
your children are allowed to Mary your second cousins.your children are allowed to Mary your second cousins.
Your second cousins.
Your mother's sister's children are your 1st cousins.
Your children and your first cousin's children are second cousins. Your children and your second cousin's children are third cousins. And so forth.
Your son and your nephew are First Cousins. The children of your nephew and the children of your son are Second Cousins to each other.
Cousin once removed.
Your uncle's grandchildren are your first cousins, once removed. They and your grand children are your second cousins, once removed
You're not related.
Half-Sister Cousins
Your child and your great nephew's parents would be first cousins. Their children would then be second cousins. And if they have children, they will be third cousins.