I’d not consider [name_f]Cordelia[/name_f] or [name_f]Beatrice[/name_f] as “mythological”:
[name_f][/name_f][name_f]Cordelia[/name_f] is attributed to having its occurence Shakespeare’s [name_m]King[/name_m] [name_m]Lear[/name_m] based off [name_f]Cornelia[/name_f] or The [name_f]Faerie[/name_f] [name_f]Queen[/name_f] by [name_m]Spenser[/name_m]. Historically there may have been an earlier character of that name daughter of an actual [name_m]King[/name_m] [name_m]Leir[/name_m].
[name_f]Beatrice[/name_f] is another name thought to be Shakespearean in the [name_f]English[/name_f] speaking world but was the name of Dante’s muse, tho there was an earlier [name_m]Saint[/name_m] with a version of that name. [name_f][/name_f] It is associated with beatus but that may not be the origins.
[name_f][/name_f]I like [name_f]Beata[/name_f].
[name_f][/name_f][name_f]Cersei[/name_f] I have never seen before tho [name_f]Circe[/name_f] was a character from mythology (the Odyssey) a witch no not the most auspicious name. I’d avoid it.
[name_f][/name_f][name_f]Saoirse[/name_f] [seer sheh] is a Gaelic name meaning freedom.
Of all the names I prefer [name_f]Cordelia[/name_f] (for its root meaning, heart).