Your daughter's second cousin is your first cousin, once removed, but only if your daughter's second cousin descends from your aunt or uncle. If your daughter's second cousin descends from your spouse's aunt or uncle, then your daughter's second cousin in not related to you.
Your first cousin's daughter is your first cousin, once removed.
Her first cousin could also be your first cousin, once removed. That would be the case if her cousin was the child of a sibling of your first cousin.
However, her first cousin could be the child of a sibling of the spouse of your first cousin. In that case, her first cousin is not related to you at all.
Your first cousin's daughter and your daughter are second cousins.
Your first cousin's granddaughter and your daughter are second cousins, once removed.
First cousins, twice removed. Aunts daughter is your cousin. Aunts daughters daughter is cousin once removed Aunts daughters daughters daughter is cousin twice removed.
Your cousin's daughter is your first cousin once removed. Your daughter and your cousin's daughter would be second cousins.
Your daughter and your first cousin are first cousins, once removed.
Either they are second cousins or technically not related at all. Your cousin's niece would be one of her siblings' children, in which case it would one of your cousin's daughters, or her spouses' niece, in which case there is no blood relationship, but most families would refer to them as a cousin.
Your daughter is first cousin once removed to your cousin. Your daughter is second cousin to your cousin's children. Your cousin's children are first cousins once removed to you
Your daughter and your second cousin are second cousins, once removed.
Your aunt's daughter is your first cousin.
Your first cousin's daughter and your son are second cousins to each other. Your second cousin's daughter and your son are third cousins to each other. Your third cousin's daughter and your son are fourth cousins to each other. And so forth.
They would be second cousins.
the first cousin and daughter would be second cousins.
Your first cousin's daughter and your son are second cousins to each other. Your second cousin's daughter and your son are third cousins to each other. Your third cousin's daughter and your son are fourth cousins to each other. And so forth.
Your son and the daughter of your first cousin are second cousins to each other. The daughter of your first cousin is your first cousin once removed.