| Clue | Source | Date |
|---|---|---|
| Friedrich von —, composer of operas Alessandro Stradella and Martha | Mirror Quiz | 22 Dec 2023 |
| Friedrich von -, composer of operas Alessandro Stradella and Martha | ||
| Friedrich von --, German composer of the opera 'Martha' | The Telegraph General Knowledge | 02 Sep 2019 |
| 'Martha' composer | ||
| "Martha" composer |