孙女 is the Chinese kinship term for paternal granddaughter ie son's daughter. Search the family tree for the paternal granddaughter's father!

堂姐 is the Chinese kinship term for older daughter of father's brother. Search the family tree for the 堂姐's older brother!

妹夫 is the Chinese kinship term for younger sister's husband. Search the family tree for the 妹夫's mother.