Animal Family

• Aunt: father's sister, mother's sister, father's brother's wife, mother's brother's wife
• Nephew: sister's son, brother's son, wife's brother's son, wife's sister's son, husband's brother's son, husband's sister's son
• Niece: sister's daughter, brother's daughter, wife's brother's daughter, wife's sister's daughter, husband's brother's daughter, husband's sister's daughter
When additional generations intervene (in other words, when one's collateral relatives belong to the same generation as one's grandparents or grandchildren), the prefixes "great-" or "grand-" modifies these terms. Also, as with grandparents and grandchildren, as more generations intervene the prefix becomes "great-grand-," adding an additional "great-" for each additional generation. Most collateral relatives have never had membership of the nuclear family of the members of one's own nuclear family.