Cythina is an uncommon, melodic given name of unknown etymology. It appears to be a variant spelling of the more familiar Cynthia, which has Latin origins and means 'woman from the cinnamon tree.' This could suggest that Cythina shares a similar connection to the Latin word for cinnamon, 'cinnamum,' but without definitive sources, its precise derivation remains elusive.
"Cythina was quite popular as a baby girl name in the late 1950s to early 1970s, with peaks in popularity between 1963 and 1972. The name saw its highest demand in 1964 with 12 births that year."