Sienna is the orangey-brown color from the Crayola boxes of crayons—but it's based on the rich color of the soil in Italy's picturesque Tuscan city, Siena. With the two ns, it's in the top 300, while the Siena spelling is just inside the top 700. Actress Sienna Miller is the name's big claim to fame.
May is, of course, the name of the fifth month, though it's also considered a nickname for Margaret. While it hasn't been in the top 1000 since the early 1980s as a first name, it's remained extremely popular in the middle slot.
In all, a lovely and poetic name pick.
Tell us: What do you think of Sienna May? Are either of those names on your baby name list?