Similar sounding names with French origins:
* Roselyne: This is the closest French equivalent, combining the French "rose" with the suffix "-lyne," which suggests a feminine name.
* Roseline: Another variation using the French "rose" with a different suffix.
* Rosalie: This is a classic French name that uses the same root as Roslyn, meaning "rose."
Other options:
* Rosé: This could be a nickname, but it's a French word meaning "pink" and could be used as a name.
* You could also consider using the French translation of "Roslyn" if it has a specific meaning in English. For example, if Roslyn means "rose" in English, you could use "Rose" in French.
Ultimately, the best French translation for "Roslyn" depends on your personal preference and the context.