Assuming he is your only sibling with female children, you would have two (2) nieces.
they have 7 daughters
He has 5 children, all of the daughters have the same 1 brother.
5, because each daughter has the same brother
Frank Lampard has 2 Nieces and 1 Nephew, Millie, Mia and Stanley - Mia & Stanley are brother & Sister
If there are 6 daughters and each daughter has one brother, that means there are 6 brothers. 6 daughters and 6 brothers = 12 children by using addition.
You are not related to your niece's husband, although some would call him your nephew by marriage. But that is a relatively recent construction and not used by many. You could also call him your brother's (or sister's) son-in-law.
The Plum family consists of Mr. and Ms. Plum, their six daughters, and one son (the brother of the daughters), making a total of 10 people in the family.
Dwight Yoakam has three nieces. He has often shared his love for his family and the joy his nieces bring to his life. However, specific details about his nieces' lives are generally kept private.
Aunt Jane's Nieces on Vacation has 305 pages.
Aunt Jane's Nieces in Society has 264 pages.
Aunt Jane's Nieces Abroad has 347 pages.
Aunt Jane's Nieces on the Ranch has 276 pages.