Dearia is a rare Greek girl's name derived from "thalassa" (sea) and "-ia" (state or quality), signifying "goddess of the sea." It was one of three thousand Oceanids in Greek mythology, revered by sailors for her protection during voyages across the vast ocean. Although not common today, Dearia gained popularity in the United States during the mid-20th century, particularly in the 1950s and 1960s.