Xandra, var. Xandria. Uncommon. Xandra, like Lyssandra, Casandra, ends with the popular feminine-sounding -ndra.
Xanthe, var. Xantha, Xanthia, means "yellow, blonde". Xanthe, Xantha and Xanthia were not Top birth names in 2014.
Xaviera, var. Xavia, Xavyera, Xavienna, means "bright, splendid; new house". Not in Top 1000.
Xeni, means "protector of plants, flowers". Not in Top 1000. See also Keni.
Xenia, var. Xia, Xena▼, Xeenia, Xiomara▼, means "guest, stranger". Usage of Xeenia and variants stepped up in the 1980s and has become less, with Xena and Xiomara becoming less trendy.
Ximena. Listed in Top 1000. See also Jimena.
Xuxa. Not in Top 1000.
Xylia, var. Xyla, Xylona, Xylina, means "woodland; wood-dweller". Unique. Xylia (cf. Tallia, Zylia) ends with the common feminine -lia.