I absolutely adore
Elowen Margaret from your list. It's actually one of my go-to combos for
Elowen. 🙂 I also find
Elowen Violet and
Elowen June to be really lovely as well.
Other ideas:
Elowen Mae (Or whichever spelling you prefer)
Elowen AvaElowen AdaElowen MariaElowen Phoebe Elowen Scarlett/Scarlet