Of all first names in the United States, about 1.6 % begin with the letter I…
This means that the initial I is found much less frequently than average. On average, each letter appears as an initial in about 3.8 % of all 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 first names in the US start with the letters A and J, while the initials U and X are the least common.
Currently, in the US, the most common girls’ name with the initial I is Isabella, and the most common boys’ name is Isaac. In the United States, approximately 1.0 % of all newborn girls are named Isabella and 0.5 % of all boys are named Isaac. Other popular first names beginning with I for girls are Isla and Ivy. For boys, the names Isaiah and Ian are currently popular.
