Girls

The charming vintage nature and color name Hazel has become popular for girls, but more than 30 baby boys were named Hazel in the US last year. In the olden days, Hazel was much more common for boys. It could shorten to cool nickname Haze or Hayes. The hero of Richard Adams' Watership Down series is a buck rabbit named Hazel.

Ivy is in the Top 50 for girls, but actually had some usage for boys for several decades. As more parents consider botanical choices for boys as well, Ivy could get some more love on both sides.

As a male name, Joni is a nickname for Jon or Jonathan, akin to Johnny or Jonny. It's more commonly used as a girl name, where it originated as a nickname for Joan.

Malin is multicultural name with many possible sources,. As a female name, Malin is popular throughout Scandinavia, a form of Magdalene. The male version has several theoretical roots. One of them is the multicultural surname Malin, which may be a matronymic descending from Magdalene or Mary or may be derived from an Irish surname meaning pleasant. In India, Malin is a male Sanskrit name meaning crowned or alternately, flower or gardener. Some may see it as a simplified spelling of the Biblical Mahlon. At once simple and unusual, the name Malin was given to 17 baby girls in the US last year but fewer than five baby boys.

Rather formal word name that has been used occasionally over the years, most notably for the autism activist and animal expert Temple Grandin.