| 100% | DEVILLE | 7 | Last name of twin toddlers Phil and Lil on 15-Across |
| 59% | PICKLES | 7 | Last name of toddlers Angelica, Tommy, and Dil on 15-Across |
| 54% | FINSTER | 7 | Last name of toddler Chuckie on 15-Across |
| 44% | OLSEN | 5 | Last name of twins Mary-Kate and Ashley |
| 42% | MCFEELY | 7 | Last name of the delivery man on 18-Across/40-Across and "Daniel Tiger's 40-Across" |
| 42% | TAM | 3 | Last name of Simon and River, on "Firefly" |
| 42% | OLSEN | 5 | Last name of acting twins Mary-Kate and Ashley |
| 42% | KRAY | 4 | Last name of London criminal twins Ronnie and Reggie |
| 42% | MAHRE | 5 | Last name of brothers Steve and Phil, 1980s Olympic skiers |
| 42% | STARK | 5 | Last name of Sansa and Arya, on "Game of Thrones" |
| 42% | MARSH | 5 | Last name of Sharon, Randy, and Stan, on "South Park" |
| 42% | CRANE | 5 | Last name of Frasier, Niles, and Martin, on a sitcom |
| 41% | ROY | 3 | Last name of Logan, Kendall, Roman, and Shiv, on "Succession" |
| 39% | COATES | 6 | Last name on the cover of Between the World and Me |
| 39% | BABBITT | 7 | Last name of 30- and 35-Across |
| 37% | VANPELT | 7 | Last name of Linus and Lucy in 44-Across: 2 wds. |
| 36% | HAMM | 4 | Last name of twin gymnasts in the 2004 Olympics |
| 36% | OLSEN | 5 | Last name of showbiz twins |
| 36% | TESS | 4 | Character name on both "This Is Us" and "The Last of Us" |
| 36% | BING | 4 | Last name of Chandler, on "Friends" |
| 36% | OBAMA | 5 | Last name of Sasha and Malia |
| 36% | BAGGINS | 7 | Last name of Frodo and Bilbo |
| 35% | MCGRAW | 6 | Last name of TV's Dr. Phil |
| 35% | OLSEN | 5 | Last name of the "Full House" twins |
| 35% | ADLER | 5 | Last name of Grace on "Will & Grace" |
| 35% | ALI | 3 | Last name of boxers Muhammad and Laila |
| 35% | OBAMA | 5 | Last name of teenagers Malia and Sasha |
| 35% | COEN | 4 | Last name of filmmakers Ethan and Joel |
| 35% | GALLO | 5 | Last name of winemakers Ernest and Julio |
| 35% | COEN | 4 | Last name of filmmakers Joel and Ethan |