Eep! You have a talent for choosing names that don't sound at all good in my ancestral German and Russian. My fav' girl names are Helen and Susan. Classic, feminine, neither trite nor foofy. Jmo.
A second name of Xiao practically begs for a polysyllabic and rhythmic counterpoint, like Penelope or Elizabeth.
The two most unfortunate names for girls of which I can think at the moment would be Astarte and Dorcas. Although the spate of last names as first names (Madison, Taylor et al., usually former Presidents!) has to be a contender. cn
I actually like different forms of the names you do, Helena and Susanna.
I prefer longer names, but I was going for what he asked for.
For example, if I could, Id offer up: Judith, Juliette, Justine, Maxine, Georgia, Theodora, Helena, Susanna, Oceania, Violet, Evangeline, Josephine, etc.