| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y |
| YELLOW ROSE | BLANCO | TEXAS | US |
| YMC | . | . | US |
| YEP ROC | CHAPEL HILL | CAROLINE DU NORD | US |
| YODEL | PONT DE CHERUY | . | F |
| YONAH | LEWISVILLE | GEORGIE | US |
| YOUNG | . | . | UK |
| YOUNG PEOPLE'S | . | . | US |
| YOUNGHEART | . | . | US |
| YOUR-PICK | . | . | US |
| YUCCA | ALAMOGORDO | NOUVEAU MEXIQUE | US |
| ZAFIRO | . | . | S |
| ZAP | MOUNT RAINIER | MARYLAND | US |
| ZENITH | . | . | US |
| ZEPHIR | HOLLYWOOD | CALIFORNIE | US |
| ZETA | . | . | ? |
| ZEZE PRODUCTION | . | . | US |
| ZIL | NASHVILLE | TENNESSEE | US |
| ZIP | LOS ANGELES | CALIFORNIE | US |
| ZIP | PASADENA | TEXAS | US |
| ZIRKON | MONTREAL | QUEBEC | CAN |
| ZYX | . | . | D |
| ZODIAC | . | . | US |
| ZOE | . | . | US |
| ZONIA | MEMPHIS | TENNESSEE | US |
| ZONK | . | . | US |
| ZTT | . | . | UK |
| ZU ZAZZ | . | F | |
| ZULUDOG | . | . | US |
| ZYNN | CROWLEY | LOUISIANE | US |
| ZYX | . | . | UK |
| ZZ | NEWARK | OHIO | US |