| One of the Maritime Provinces: Abbr. | 36 |
| One of the Mario brothers | 25 |
| One of the Marianas | 19 |
| One of the Marches | 18 |
| One of the March women | 22 |
| One of the March sisters | 24 |
| One of the March girls | 22 |
| One of the manships | 19 |
| One of the Mannings | 19 |
| One of the Manning quarterbacks | 31 |
| One of the Manning NFLers | 25 |
| One of the Manning brothers | 27 |
| One of the Mamas and the Papas | 30 |
| One of the Mamas | 16 |
| One of the majors | 17 |
| One of the major world religions | 32 |
| One of the major religions | 26 |
| One of the major leagues: Abbr. | 31 |
| One of the major leagues, briefly | 33 |
| One of the major leagues (abbr.) | 32 |
| One of the maj. leagues | 23 |
| One of the Magi, and namesakes | 30 |
| One of the Magi | 15 |
| One of the M's of 3M: Abbr. | 31 |
| One of the M's in MoMA | 26 |
| One of the M's in MMR | 25 |
| One of the Loyalty Islands | 26 |
| One of the Lower Lakes | 22 |
| One of the Low Countries: Abbr. | 31 |
| One of the Louisiana Purchase negotiators | 41 |
| One of the lotophagi | 20 |
| One of the Lost Generation | 26 |
| One of the losers in the War of the Pacific | 43 |
| One of the Longs of La. | 23 |
| One of the Longs | 16 |
| One of the Long fellows | 23 |
| One of the long bones | 21 |
| One of the living dead | 22 |
| One of the lives in Plutarch's "Lives" | 52 |
| One of the Little Women | 23 |
| One of the little things in life? | 33 |
| One of the little piggies | 25 |
| One of the little people | 24 |
| One of the little foxes | 23 |
| One of the Little Einsteins | 27 |
| One of the literary Waughs | 26 |
| One of the Lindberghs | 21 |
| One of the Lincolns | 19 |
| One of the life sciences: Abbr. | 31 |
| One of the Levant States | 24 |
| One of the Lesser Sundas | 24 |
| One of the lesser Kardashians | 29 |
| One of the leporids | 19 |
| One of the leporidae | 20 |
| One of the Lennons | 18 |
| One of the Lennon sisters | 25 |
| One of the legumes | 18 |
| One of the Leewards, informally | 31 |
| One of the Leewards | 19 |
| One of the Leeward Islands | 26 |
| One of the Leeward Antilles | 27 |
| One of the leagues: Abbr. | 25 |
| One of the Leagues | 18 |
| One of the leaders on a talk show | 33 |
| One of the Lauders | 18 |
| One of the lanthanides | 22 |
| One of the landed gentry | 24 |
| One of the Lakers | 17 |
| One of the Ladds | 16 |
| One of the L.A. times | 21 |
| One of the L.A. Rams' Fearsome Foursome | 43 |
| One of the Krupps | 17 |
| One of the Kramdens | 19 |
| One of the kitchen police | 25 |
| One of the kings in Kings | 25 |
| One of the Kings | 16 |
| One of the kingdoms | 19 |
| One of the king's men | 25 |
| One of the King Sisters of 40's music | 41 |
| One of the King Sisters | 23 |
| One of the kin (Abbr.) | 22 |
| One of the kin | 14 |
| One of the kids in a 1985 flick | 31 |
| One of the Khans | 16 |
| One of the Keys | 15 |
| One of the Kennedys, and namesakes | 34 |
| One of the Kennedys | 19 |
| One of the Kennedy clan | 23 |
| One of the Keebler elves | 24 |
| One of the Keatons | 18 |
| One of the Kayes | 16 |
| One of the Katzenjammer Kids | 28 |
| One of the Kardashians | 22 |
| One of the Karamazovs | 21 |
| One of the Karamazov brothers | 29 |
| One of the Kahns et al. | 23 |
| One of the Julians | 18 |
| One of the judges in Judges | 27 |
| One of the Judds | 16 |
| One of the Joneses | 18 |