Rosemary is a feminine given name, a combination of the names Rose

Rose (name)

Rose is a given name and surname. The surname Rose can be of English, Scottish, French, and German origin.Rose is a popular given name, it originally was a Norman form of a German name Hrodheid, composed of the words Hrod and Heid . It was originally spelt Roese or Rohese...

 and Mary

Mary (given name)

Mary is a feminine given name, the English form of the name Maria, which was in turn a Latin form of the Greek names Μαριαμ, or Mariam, and Μαρια, or Maria, found in the New Testament. Both New Testament names were forms of the Hebrew name מִרְיָם or Miryam.The usual meaning given by various...

. It can also be used in reference to the herb named rosemary

Rosemary

Rosemary, , is a woody, perennial herb with fragrant, evergreen, needle-like leaves and white, pink, purple or blue flowers, native to the Mediterranean region. It is a member of the mint family Lamiaceae, which includes many other herbs, and is one of two species in the genus Rosmarinus...

. Rosemary has been in steady use in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and has ranked among the top 1,000 for 110 years. It was ranked as the 754th most popular name for American girls born in 2008. Its greatest period of popularity in the United States was between 1925 and 1950, when it was ranked among the top 150 names for girls. Rosemarie is another variant. Romy is a German

German language

German is a West Germanic language, related to and classified alongside English and Dutch. With an estimated 90 – 98 million native speakers, German is one of the world's major languages and is the most widely-spoken first language in the European Union....

nickname for the name.