Or something like [name_m]Caydon[/name_m]/[name_m]Jaydon[/name_m]/ sort of thing. but nothing that we have seen has felt or sounded right so far as her first name is very airy and feminine and [name_f]Dawn[/name_f] just seems so blunt and short.
My only hang up about the names you have listed here is that they all sound very masculine, and I feel like the [name_f]Dawn[/name_f] part gets lost in translation on names like [name_m]Caydon[/name_m] and [name_m]Jaydon[/name_m].
The first name that came to mind was Harlowe [name_f]Donna[/name_f]. The names [name_f]Aurora[/name_f] and [name_f]Roxanne[/name_f] also mean dawn. If you’re alright with sacrificing the D sound, you could als use the rhyming [name_f]Fawn[/name_f].
[name_f]Aurora[/name_f], [name_f]Roxanne[/name_f], [name_f]Zorah[/name_f], [name_f]Zaria[/name_f], [name_f]Oriana[/name_f], [name_f]Eos[/name_f]… all pretty options related to the meaning “dawn”.
Or you could do names meaning “sun” or “light”: [name_f]Soleil[/name_f] (sol-AY), [name_u]Ray[/name_u]/[name_u]Rae[/name_u], [name_f]Cyra[/name_f] (SEER-ah), [name_f]Solana[/name_f], [name_f]Lux[/name_f], [name_f]Claire[/name_f], [name_f]Elena[/name_f], [name_f]Liora[/name_f], [name_f]Noor[/name_f]…
To me, the meaning connection works better here, as none of the names you listed feel especially connected to [name_f]Dawn[/name_f] to me, apart from containing the letters “d” and “n”. I especially like the idea of Harlowe [name_u]Rae[/name_u] for you - it feels like a very on-trend, current choice; it flows really nicely and feels feminine but bold, like Harlowe; and [name_u]Rae[/name_u] ties in nicely with [name_f]Dawn[/name_f] both in terms of meaning and as another single-syllable nature name.