Yaffa, var. Yaffah, means "lovely". Not in Top 1000.
Yahaloma, means "diamond". Unusual, but Yahaloma is similar to common -ma last names Paloma (top 34%), Jaloma (94%).
Yaira, var. Yeira, means "to illuminate". Not Top 1000 names.
Yakira, var. Yekara, means "costly, precious". Yakira and Yekara are not Top 1000 names.
Yalena, var. Yelena, means "sun ray". Unique. Yalena, Yelena (cf. Carolena, Valena) end with the favored feminine -lena.
Yaminah, var. Yemina, Yamina, means "suitable, proper". Outside Top 1000.
Yancey, var. Yancy, Yancie, Yancee. Yancy and variants are barely found as given names.
Yannick, var. Yann, Yannic, Yanick, means "God is gracious". Not in Top 1000.
Yara, means "water lady; small butterfly". Not Top 1000 name. See also Dara.
Yarina, var. Yerina, Yaryna. Outside Top 1000.
Yarmilla, means "trader". Yarmilla was not among 2014's Top names. See also Carmilla.
Yarona, means "she will rejoice". Unconventional, but Yarona is comparable to popular -rona last names Varona (upper 13%), Marona (65%). See also Yerina.
Yasmin▼, var. Yazmin▼, Yasmina, Yasmine▼, Yasmene, Yasmena, Yasamin, Yasiman, Yasmeen▼, Yasminda, Yasmeena, means "jasmine flower". Frequently used as birth names, Yazmin, Yasmin, etc. are comparable to the conventional Jazmin.
Yekaterina. Not that common as a girls' name. See also Yekaterin.
Yelisabeta, var. Yelizabet, Yelizavetha, Yelisabetta, means "God is my oath". Yelizavetha and variants are unique as baby names.
Yerusha, var. Yeruscha, means "married, belonging to someone". Not in Top 1000.
Yesenia▼, var. Yasenia, Yesemia, Yazenia, Yessenya, Yessenia▼. Rare. Yesenia, var. (cf. Calligenia, Imogenia) end with the common feminine -enia.
Yessica, var. Yessika, Yesseca, means "He sees". Not in Top 1000.
Yetta▼, var. Yette, means "home leader". Somewhat frequently used as baby names, Yetta and Yette are similar to the conventional Retta.
Yeva, var. Yevka, means "life". Uncommon, but Yeva is comparable to common -va surnames Kleva (upper 77%), Leyva (1%).
Ynez, var. Ynes, Ynesita, means "chaste". Ynez, Ynes and Ynesita were not among 2014's Top names.
Yoana, var. Yana, Yanna, Yoanna, Yoanah, Yoannah, means "God is gracious". Uncommon. Yoana, Yana, like Morgana, Krystiana, end with the popular feminine-sounding -ana.
Yoconda, means "delight". Not Top 1000 name.
Yoko, means "good, positive". Not that prominent as a girls' name nowadays, though Yoko is still found often as a first name for women.
Yolanda▼, var. Yola, Yolie, Yoland, Yolonda, Yolette, Yulanda, Yalinda, Yalonda, Yolande, Yolaiza, .. 3 more, means "violet flower". Less widespread today. Yolanda was the variation last listed (2002) in the Top 1000.
Yonina, var. Yona, Yonah, Yonit, Yonita, Yonina, Yoninah, means "dove". Outside Top 1000.
Yordan, var. Yordana, Yordanna, means "descend". Yordan (top 78%), like Yordy (top 21%), Younan (14%), is a popular surname that starts with Yo-.
Yoslene, var. Yosline, Yoslina, Yosleen, means "the Gauts". Unusual. Yoslene (cf. Lurlene, Madelene) ends with the favored feminine -lene.
Yosepha, var. Yosefa, Yuseffa, means "Jehovah increases". Yosepha, Yosefa and Yuseffa are not in the Top 1000.
Ysabel, var. Ysbel, Ysobel, Yabell, Ysabell, Yabella, Yabelle, Ysbella, Ysabella, Ysabelle. Outside Top 1000.