| 100% | GIBB | 4 | Last name of the brothers in 33a |
| 80% | GIBB | 4 | Last name of the brothers in the 19-Across |
| 72% | ALOU | 4 | Last name of the only MLB brother trio to play together in the outfield |
| 65% | GIBB | 4 | Last name of the Bee Gees brothers |
| 65% | ROY | 3 | Last name of the family in "Succession" |
| 65% | COEN | 4 | Last name of the brothers who directed "O Brother, Where Art Thou?" |
| 64% | AMES | 4 | Last name of the "Rag Mop" singing brothers |
| 64% | PARR | 4 | Last name of the family in "Incredibles 2" |
| 64% | PLUM | 4 | Last name of the professor in the game Clue |
| 64% | SKYWALKER | 9 | Last name of the main character in Star Wars |
| 64% | BANKS | 5 | Last name of the family in "Mary Poppins Returns" |
| 62% | COEN | 4 | Last name of the filmmaking brothers who made "Raising Arizona" and "Fargo" |
| 62% | NEILL | 5 | Last name of the "Jurassic Park" star who cameoed in "Thor: Ragnarok" |
| 62% | MARCH | 5 | Last name of the sisters in Louisa May Alcott's "Little Women" |
| 61% | PARTON | 6 | Last name of Islands in the Stream singer |
| 61% | EPHRON | 6 | Last name of sisters in the film industry |
| 61% | BAUER | 5 | Last name of Jack, the CTU agent in 24 |
| 60% | RADCLIFFE | 9 | Last name of the actor who was the titular protagonist in "Harry Potter" series |
| 60% | SOSA | 4 | Last name of the only player in MLB history with three 60-homer seasons |
| 60% | GAD | 3 | Last name of Josh, the voice of Olaf in Frozen |
| 60% | SPADE | 5 | Last name of Sam, detective in The Maltese Falcon |
| 60% | CONNOR | 6 | Last name of Sarah targeted in The Terminator |
| 60% | ONO | 3 | Last name of the woman in the Beatles song "The Ballad of John and Yoko" |
| 59% | HAMM | 4 | Last name of twin gymnasts in the 2004 Olympics |
| 58% | ENO | 3 | Last name in the credits of many U2 albums |
| 57% | BONO | 4 | The last name of Sonny in the duo Sonny & Cher |
| 57% | ISLEY | 5 | Name of brothers in the Rock & Roll Hall of Fame |
| 57% | EARP | 4 | Last name of lawmen Wyatt and Virgil in the gunfight at the O.K. Corral |
| 56% | HOYT | 4 | First or last name in the Baseball Hall of Fame |
| 56% | ARNOLD | 6 | First and last name in the cast of "True Lies" |