Only about one in 50 girls' first names in the United States begins with the letter Z…
This means that the initial Z is found much less frequently than average. On average, each letter appears as an initial in about 3.8 % of all girls' names, considering the 26-letter English alphabet. Reality is always different, of course: Some initials appear particularly frequently, while others are much rarer. The most common initials among girls' first names in the United States are A and S, while very few names begin with the letters U and X.