| 100% | AMES | 4 | Last name of the "Rag Mop" singing brothers |
| 65% | GIBB | 4 | Last name of the Bee Gees brothers |
| 65% | GIBB | 4 | Last name of the brothers in 33a |
| 63% | GIBB | 4 | Last name of the brothers in the 19-Across |
| 62% | COEN | 4 | Last name of the brothers who directed "O Brother, Where Art Thou?" |
| 62% | COEN | 4 | Last name of the filmmaking brothers who made "Raising Arizona" and "Fargo" |
| 61% | GRANDE | 6 | Last name of the artist who sings Thank U, Next |
| 61% | JONAS | 5 | Last name of singing brothers Joe, Nick, and Kevin |
| 60% | ALOU | 4 | Last name of the only MLB brother trio to play together in the outfield |
| 54% | GIBB | 4 | Last name of the Bee Gees |
| 53% | COEN | 4 | Last name of the directors of "Fargo" |
| 53% | FREUD | 5 | Last name of the founder of psychology |
| 53% | SKINNER | 7 | Last name of The Simpsons' school principal |
| 53% | GIBB | 4 | Last name of the "Night Fever" singers |
| 53% | ROY | 3 | Last name of the family in "Succession" |
| 53% | OLSEN | 5 | Last name of the "Full House" twins |
| 53% | ALOU | 4 | Last name of a trio of baseball brothers |
| 53% | HANDLER | 7 | Last name of the host of "Chelsea Lately" |
| 53% | COEN | 4 | Last name of the directors of "Hail, Caesar!" |
| 53% | KENT | 4 | Last name of the family that adopted Superboy |
| 53% | HESTON | 6 | Last name of The Ten Commandments actor Charlton |
| 53% | PARR | 4 | Last name of the family in "Incredibles 2" |
| 53% | ONEAL | 5 | Last name of the basketball star nicknamed "Shaq" |
| 53% | ALI | 3 | Last name of the boxer born Cassius Clay |
| 53% | ALDA | 4 | Last name of the actor who played Hawkeye |
| 52% | BUCHANAN | 8 | Last name of the 15th president of the US |
| 52% | PLUM | 4 | Last name of the professor in the game Clue |
| 52% | WARHOL | 6 | Last name of the pioneer artist of Pop Art |
| 52% | SKYWALKER | 9 | Last name of the main character in Star Wars |
| 52% | BANKS | 5 | Last name of the family in "Mary Poppins Returns" |