Briar comes from the English word for a thorny shrub — particularly the wild rose. The Disney film Sleeping Beauty (1959) gives the heroine the alias "Briar Rose" while in hiding.
Briar has been rising rapidly in the U.S. as part of the broader return of nature names. Today it sits in the U.S. top 500.
Briar reduces to four — the number of thorny rooted strength.