I like this name. Right now my favourite spelling is
Thecla but
Thekla is gaining on it again. I think
Tecla is my least favourite.
I would probably pair it with something lighter and more youthful, so from yours I like
Tecla Susanna best. I'd maybe go with
Thecla Olivia or
Thecla Melody.
https://www.behindthename.com/pnl/109883