Shawnacy \sha(w)-na-cy\ as a girl's name is of Gaelic origin. Of uncertain meaning. Possibly related to Shawna.
Shawnacy has 4 variant forms: Seaughnessy, Seanucie, Shaughnessy and Shawnessy.
Baby names that sound like Shawnacy are Shawnice, Shanice, Shahnaz, Shannice, Shawniece and Shaunice.