| One of the Keebler elves | 24 |
| One of the Kennedy clan | 23 |
| One of the kin (Abbr.) | 22 |
| One of the King Sisters | 23 |
| One of the king's men | 25 |
| One of the kings in Kings | 25 |
| One of the kitchen police | 25 |
| One of the landed gentry | 24 |
| One of the lanthanides | 22 |
| One of the leagues: Abbr. | 25 |
| One of the Leeward Antilles | 27 |
| One of the Leeward Islands | 26 |
| One of the Lennon sisters | 25 |
| One of the lesser Kardashians | 29 |
| One of the Lesser Sundas | 24 |
| One of the Levant States | 24 |
| One of the literary Waughs | 26 |
| One of the Little Einsteins | 27 |
| One of the little foxes | 23 |
| One of the little people | 24 |
| One of the little piggies | 25 |
| One of the Little Women | 23 |
| One of the living dead | 22 |
| One of the Long fellows | 23 |
| One of the Longs of La. | 23 |
| One of the Lost Generation | 26 |
| One of the Lower Lakes | 22 |
| One of the Loyalty Islands | 26 |
| One of the M's in MMR | 25 |
| One of the M's in MoMA | 26 |
| One of the maj. leagues | 23 |
| One of the major religions | 26 |
| One of the Manning brothers | 27 |
| One of the Manning NFLers | 25 |
| One of the March girls | 22 |
| One of the March sisters | 24 |
| One of the March women | 22 |
| One of the Mario brothers | 25 |
| One of the Marsalis brothers | 28 |
| One of the Marshall Islands | 27 |
| One of the martial arts | 23 |
| One of the Marx brothers | 24 |
| One of the Maverick brothers | 28 |
| One of the Mayberry gang | 24 |
| One of the media: Abbr. | 23 |
| One of the media: Var. | 22 |
| One of the men behind bars | 26 |
| One of the Menendez brothers | 28 |
| One of the Mercury Seven | 24 |
| One of the midday-sun seekers | 29 |
| One of the Minor Prophets | 25 |
| One of the moons of Uranus | 26 |
| One of the moveable feasts | 26 |
| One of the Mrs. Sinatras | 24 |
| One of the Ms. Pac-Man ghosts | 29 |
| One of the musical B's | 26 |
| One of the musical Guthries | 27 |
| One of the Near Islands | 23 |
| One of the New Hebrides | 23 |
| One of the NFL Mannings | 23 |
| One of the Nielsen brothers | 27 |
| One of the nightshade family | 28 |
| One of the noble gases | 22 |
| One of the noble metals | 23 |
| One of the North Africans | 25 |
| One of the O'Neills | 23 |
| One of the Oasis brothers | 25 |
| One of the Obama daughters | 26 |
| One of the Obama girls | 22 |
| One of the oceans: Abbr. | 24 |
| One of the Olsen sisters | 24 |
| One of the Olsen twins | 22 |
| One of the original 13 | 22 |
| One of the original 13: Abbr. | 29 |
| One of the Orkney Islands | 25 |
| One of the Pac-Man characters | 29 |
| One of the Pac-Man ghosts | 25 |
| One of the Palin children | 25 |
| One of the Parcae et al. | 24 |
| One of the Parnassus nine | 25 |
| One of the Philippines | 22 |
| One of the phys. sciences | 25 |
| One of the Pillars of Islam | 27 |
| One of the Pine Islands | 23 |
| One of the Plain People | 23 |
| One of the Pointer Sisters | 26 |
| One of the Ponderosa boys | 25 |
| One of the Poor Clares | 22 |
| One of the Power Rangers | 24 |
| One of the Prairie Provinces | 28 |
| One of the prexy's staff | 28 |
| One of the pride of Joy | 23 |
| One of the Princetonians | 24 |
| One of the Prozorov sisters | 27 |
| One of the Quad Cities | 22 |
| One of the Quechuan people | 26 |
| One of the Queen's pets | 27 |
| One of the R's of R&R | 29 |
| One of the Rams' QB's | 29 |
| One of the rare earths | 22 |