I was just looking at the lists of the most common male and female first names previously mentioned and noticed astounding differences in distribution of names. Each of these files account for approximately 90% of the U.S. population by gender, yet...

• there are 3.5 times as many female names as male names (4,275 female and 1,219 male).
• there are eleven male names which represent more than 1% of the sample, and only three such female names
• the top 10 male names represent 23.5% of the sample, the top 10 female names only represent 10.7% of the sample