Hoa

Hoa is also used as a masculine name in Vietnamese. However, it's more common for females. So, I think that the "Gender" of this name should be changed from "Feminine" to "Feminine & Masculine".

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Source: https://forebears.io/forenames/hoa

This name is one of the most common I hear here in Vietnam. Seems every girl has Hoa somewhere in her name. I have never liked it on it's own, but with other Vietnamese names, like Thuy, it can sound nice.