Cinnamon_Grace's list "Flower Names" of 2 great name ideas: Posy - Lavender!

Flower Names

A sweet, nostalgic nosegay kind of name, Posy has been long fashionable in England, a country of gardeners, but this pretty bouquet-of-flowers name is still rarely heard in the US, though it could be seen as a more unusual possible alternative to Rosy or Josie.
 Posy is a little sister name in the Hunger Games series, while before that, Posy Fossil was a character in Noel Streatfeild's Ballet Shoes. In 2026, it appeared on a character in the popular TV series, Bridgerton.
 
For now, Posy is the least popular spelling of the name with Posie first, Posey second, and Posy used for less than ten baby girls in the US in a recent count.
 Posy (or Posey or Posie) could also work as a nickname for a range of other names, from Penelope to Sophia to Primrose, though it started as a pet form of Josephine. Other P-beginning flower names you may want to consider along with Posey: Poppy, Petal, Primrose.

Posy

Lavender lags far behind sweet-smelling purple-hued sister names Violet and Lila, but is starting to get some enthusiastic attention from cutting-edge namers along with other adventurous nature names like Clementine and Marigold. In fact, 2024 saw it enter the US Top 1000 for the first time, when it was given to nearly 260 girls.

 The flower's name derives from Latin lividus "bluish", influenced by lavō "wash" due to use of lavender in washing clothes. It has long been used in traditional medicine and in cooking for its sweet fragrance and soothing properties. But it also has a long history as a name, going back to the eighteenth century, when it was also used for boys. 

 Famous fictional namesakes include Lavender Brown, a witch character in the Harry Potter saga, and the eponymous heroine's best friend in Roald Dahl's Matilda.