Noble
Allysa is a modern spelling variant of Alyssa, which is derived from the flower name Alyssum. It is also frequently used as a diminutive form of Alice, tracing back to the Germanic name Adalheidis, meaning noble type.
Less common today
Allysa isn't in the latest US Top 1000. It last peaked at #1,223 in 1998.
American Paralympic gold medalist triathlete
US births per 5-year period, 1990βpresent (SSA data).