| Abbrev | Name | Spec | Type | Locality |
|---|---|---|---|---|
| YW | YORKWIN[1281]; | TR.AE | W | USA |
| YWH | YAMHILL | TR.AE | W | USA:OREGON |
| YY | YAYLA[1281]; | TR.AE | TUR | |
| YY305 | YAYLA-305[1281]; | TR.AE | TUR | |
| YYM | YUYIMAI[1281]; | TR.AE | CHN | |
| YZK | YANZEK[1281]; | TR.AE | ||
| Z57 | ZIPA-57[1765] | TR.AE | S | COL |
| Z68 | ZIPA-68[1765] | TR.AE | S | COL |
| ZA56 | ZA-56[1281]; | TR.AE | SUN | |
| ZA75 | ZARAGOZA-75[114][144][1281]; | TR.AE | S | MEX |
| ZA75ZP | ZA75.ZP[1281]; | TR.AE | ZWE | |
| ZA77 | ZA-77[1281]; | TR.AE | S | PAK |
| ZA88 | ZARAGOZA-88[1281]; | TR.AE | S | GTM |
| ZAF | ZAAFRANE[114][144][1281]; | TR.AE | TUN | |
| ZAGU | ZARAGURO[1281]; | TR.AE | ||
| ZAK | ZEREMAK | TR.DR | ||
| ZAM | ZAMBEZI[3733] | TR.AE | S | ZWE |
| ZAR | ZARAPITIN[3692]; | TR.DR | S | MEX |
| ZAR1 | ZARAPITIN-1[1281]; | TR.DR | S | MEX |
| ZAR10 | ZARAPITIN-10[1281]; | TR.DR | S | MEX |