Posie (also spelled Posy) comes from the English word posy, originally a short verse or motto, then a small bouquet of flowers carried as a fragrant token. The word ultimately derives from poesy (poetry).
Posie has been rising in the United Kingdom as a contemporary girls' name. In the U.S. it entered the top 1000 in 2023. Two soft syllables with a small handful of flowers inside.
Posie reduces to nine — the number of small fragrant gifts.