哥哥elder brother; elder male relative of the same generation
外甥女sister's daughter; granddaughter
奶奶grandmother; respectful form of address for an elderly woman
姐妹elder sister and younger sister; elder sister and younger sister
姐姐elder sister; girl or woman who is of the same generation but older in age
婶婶wife of one's father's younger brother
宝宝dear; another name for I/me, which comes from Internet buzzword "I'm scared to death"
堂姐female cousin on the male side