义妹用英语

堂哥、堂弟、堂姐、堂妹,表哥、表弟、表姐、表妹统统用cousin.

义兄、义弟、义姐、义妹,义母、义父用stepbrother,stepsister,stepfather,stepmother

养父母用foster father,mother或adoptive father、 mother

曾孙,曾孙女,great-grandson,great-granddaughter