I like
Jan somewhat (the English name) but not so much
Janna.
Jana with its soft a sound is prettier. The y is a superior vowel in this case.
Name These Characters 1 (over)
https://www.behindthename.com/bb/game/5316320
Name These Characters 2 (over)
https://www.behindthename.com/bb/game/5327763
Name These Characters 3 (over)
https://www.behindthename.com/bb/all/5332744