| Answer | Crossword Clue |
|---|---|
| NAN | Bert's fictional sister |
| NAN | Bert's fictional twin sister |
| NAN | Bert's sister |
| NAN | Bert's twin sister |
| NAN | Bert's sister in books |
| NAN | Bert's sister in children's literature |
| NAN | Bert's twin sister, in fiction |
| NAN | Bert's sister in "The Bobbsey Twins" |
