Your niece is the daughter of your brother or sister.
Your first cousin is the child of your parent's brother or sister.
Your second cousin is the grandchild of your grandparent's brother or sister.
Your third cousin is the great grandchild of your great grandparent's brother or sister.
yes of course undertaker has cousins and neices every body needs to if he didnt have cousins or nieces he would be misrable.
Your son and your niece are first cousins to each other. Your son and your niece's son are first cousins, once removed.
Cousins
They are your nieces and nephews and not your cousins
If you have two nieces who are not sisters but are each the daughters of your siblings, the two nieces are first cousins. If they each have a daughter, those daughters are second cousins to each other.
Your mother's nieces' children are your mother's grand nephews or grand nieces. They are your first cousins, once removed.
They are 1st cousins once removed.
They are 2nd cousins.
Second cousins.
you anwser
Your daughters are great aunties if their nieces have kids. Your daughters kids are your grand children.
Your borther-in-law's children are your nieces and nephews. You are their uncle or aunt, as is your spouse.