I’ll nominate:
Nylah
Tansy Pansy may never come back, but this soundalike is such a spunky floral that makes the perfect alternative IMO!
Petula
Catrinel
Seren
Makelesi
Arlenis nn’s galore e.g. Ari, Aley, Leni, Liss, Arlis…
Psamathe an ancient Greek sandy Samantha
Karida I think this might be an Arabic variant of Katherine
Theodenanda found here Theodenanda
Zaide spelling variation I’ve heard touted around the name-community
Taran seconding @GreenEyes375
Ives
Karch Charles meets larch
Perhonen (pretty butterfly meaning but with traditional masculine sounds)
Tedrick a theodorian alternative
Timoleon - yes @PeachyMum he’s such a gem!
Hallam rugged meaning, soft sounds, academic vibes as it’s the name of a university in the UK
Liodor feels like a lovely Leo x Theodore hybrid but may I warn you that it’s very rare that anyone shares my love of Liodor!
Arwel A Welsh Name A Day - #10 by Carys1