My instinct would be LEE-on-tine. Looks too much like an adjective: I much prefer glorious
Leontina.
I like
Leontine Amy,
Leontine Aurora (and I'm
Aurora's #1 disparaged!), and
Leontine Allegra.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080