I think it is very pretty. However, it has the same issues as
Ilene.
The capital "i" plus the lowercase "L" together is often hard to distinguish.
That aside, I think that
Ilona is perfectly suited for a kid today. It's simple, has a history of usage, yet is not very common even though it has a trendy feel to it.
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Momma to Clarisse Bituin Gioia and Nadine Marikit Irene. Mahal na mahal from our little family to yours!