The zippiest, zestiest first initial for baby names around must be Z.  Zoe and Zachary are the top baby names starting with Z in the US. Along with all the versions of Zoe and Zachary, names beginning with Z on the US Top 1000 include Zion, Zayden, Zane, Zara, Zuri, Zander, and Zaylee. Unique cool names starting with Z range from Zelig to Zelda. 
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Zara, the name of one of the Queen's granddaughters, is the top-ranked Z name in England, while Zelie makes the Top 100 in France. And names starting with Z are among the hottest on Nameberry, rising more than 100% year over year.
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Z as an initial is so intrinsically cool it may be that there are no baby names starting with Z that aren't cool. Here are some of the best Z-starting names for baby boys and baby girls.

Cool Baby Names That Start With Z

Zalomon

Cool Baby Names That Start with Z - child sleeping

Cool Baby Names That Start with Z

Cool Baby Names That Start with Z (Page 7)