Only about 1.6 % of girls' first names in the United States begin with the letter P…
This means that the initial P 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. However, the average is only a median, as initials aren't completely evenly distributed, of course. Some letters are more commonly found as initials than others. Most girls' first names in the US start with the letters A and S, while the initials U and X are the least common.