| 100% | ALOU | 4 | Last name of baseball-playing brothers Matty, Felipe, and Jesús |
| 98% | ALOU | 4 | Last name of baseball-playing brothers Jesus, Matty, and Felipe |
| 85% | ALOU | 4 | Last name of baseball brothers Matty, Felipe, and Jesús |
| 70% | ALOU | 4 | Last name of outfielders Matty, Moises, Jesus, and Felipe |
| 52% | ALOU | 4 | Brother Felipe, Matty or Jesus of baseball |
| 52% | ALOU | 4 | Last name of a trio of baseball brothers |
| 52% | CURRY | 5 | Last name of NBA brothers Steph and Seth |
| 52% | COEN | 4 | Last name of moviemaking brothers Joel and Ethan |
| 51% | JONAS | 5 | Last name of singing brothers Joe, Nick, and Kevin |
| 51% | ALOU | 4 | Family name of Matty, Jesús, Felipe, or Moisés in Major League Baseball |
| 51% | MAHRE | 5 | Last name of brothers Steve and Phil, 1980s Olympic skiers |
| 51% | COEN | 4 | Last name of directors Joel and Ethan (they're brothers) |
| 51% | WATT | 4 | Last name of football brothers J.J. and T.J. |
| 50% | DUFFER | 6 | Last name of brothers Matt and Ross who co-created "Stranger Things" |
| 49% | OTT | 3 | Last name of classical pianist Alice Sara and baseball Hall of Famer Mel |
| 49% | ALOU | 4 | Last name of the only MLB brother trio to play together in the outfield |
| 48% | COEN | 4 | Last name of the filmmaking brothers who made "Raising Arizona" and "Fargo" |
| 46% | SMOTHERS | 8 | Last name of Tom and Dick, folk comedy "Brothers" |
| 45% | ALOU | 4 | Felipe, Jesus, Moises or Matty of baseball |
| 45% | ALOU | 4 | Dynastic last name of baseball |
| 44% | ALOU | 4 | Felipe, Matty or Jesus of baseball fame |
| 43% | ALOU | 4 | Last name of a baseball dynasty |
| 43% | OBAMA | 5 | Last name of Sasha and Malia |
| 43% | BAGGINS | 7 | Last name of Frodo and Bilbo |
| 43% | ALOU | 4 | Moises, Felipe, Jesus, or Matty of baseball |
| 43% | GIBB | 4 | Last name of the Bee Gees brothers |
| 43% | GIBB | 4 | Last name of the brothers in 33a |
| 43% | ALI | 3 | Last name of boxers Muhammad and Laila |
| 43% | OBAMA | 5 | Last name of teenagers Malia and Sasha |
| 43% | BABBITT | 7 | Last name of 30- and 35-Across |