Your granddaughter's husband might be called your grandson-in-law, although the term is rarely used. Hissister is your granddaughter's sister-in-law, but is not related to you.
First cousin once removed.
a cow
grandaughter
Your daughter and your sister's child are first cousins. Your daughter and your sister's grandchild are first cousins, once removed.
Grandaughter
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.
Your grandaughter would call your brother her great uncle.
manslaughter
Neptis.
Enkelin
ljuba
"Cogratulations on your new grandaughter" in Polish is "Wszystkiego najlepszego z okazji narodzin wnuczki".