| 100% | GIBB | 4 | Surname of the musical siblings Barry, Robin, Maurice, and Andy |
| 49% | GIBBS | 5 | Barry, Robin and Maurice of the Bee Gees |
| 43% | GIBBS | 5 | Barry, Maurice, and Robin of pop |
| 42% | BROTHERSOFBAND | 14 | The Bee Gees' Barry, Robin and Maurice Gibb? |
| 41% | GIBB | 4 | Barry, Robin or Maurice of the Bee Gees |
| 40% | GIBB | 4 | Barry, Robin, or Maurice of the Bee Gees |
| 38% | BEEGEES | 7 | "Stayin' Alive" disco trio of Barry Gibb, Robin Gibb, and Maurice Gibb, with "The" (2 wds.) |
| 38% | ADAMS | 5 | Surname of the second and sixth US presidents |
| 38% | LEDGER | 6 | Surname of The Dark Knight and Casanova actor |
| 37% | JONAS | 5 | Surname of the band brothers Kevin, Joe, and Nick |
| 37% | MARX | 4 | Surname of the stars of 20-, 37- and 53-Across |
| 37% | HARPER | 6 | Surname of the brothers in Two and a Half Men |
| 36% | THEBEEGEES | 10 | Brothers Barry, Maurice, and Robin who had nine #1 songs in the 1970s (3 wds.) |
| 36% | GIBB | 4 | Last name of Bee Gees singers Barry, Maurice, and Robin |
| 36% | PARKER | 6 | Surname of the Sex and the City star known as SJP |
| 36% | FARMIGA | 7 | Surname of acting siblings Vera and Taissa |
| 36% | JONAS | 5 | Surname of singing siblings Joe, Nick and Kevin |
| 36% | MURRAY | 6 | Surname of British tennis stars Andy and Jamie |
| 36% | MURRAY | 6 | Surname of Scottish tennis brothers Andy and Jamie |
| 35% | JONAS | 5 | Surname of musical brothers Joe, Kevin, and Nick |
| 35% | BOUVIER | 7 | Surname of Patty and Selma in The Simpsons |
| 35% | GRAYSON | 7 | Real surname of Robin and Nightwing |
| 35% | BREWSTER | 8 | Surname of the family at the center of "17-Across and 58-Across" |
| 35% | UNSER | 5 | Surname of the auto racing family that includes Al, Al Junior, and Bobby |
| 35% | FANNING | 7 | Surname of siblings and American actresses Elle and Dakota |
| 35% | DESCHANEL | 9 | Surname of siblings and American actresses Emily and Zooey |
| 35% | GIBB | 4 | Barry, Robin or Maurice of pop music |
| 35% | DICAPRIO | 8 | Surname of an actor in Titanic and The Revenant |
| 34% | LEACH | 5 | "Lifestyles of the Rich and Famous" host Robin |
| 34% | LEACH | 5 | “Lifestyles of the Rich and Famous” host Robin |