Well, I actually like
Primrose... I think it sounds lovely with
Helena as a first or middle name.
Nerissa Primrose sounds nice to me as well.
But
Rosina is also lovely and, since it's more simple, might fit well with more names than
Primrose would do... So here are some combos for
Rosina:
Rosina Judith/
Judith RosinaRosina Ellen/
Ellen RosinaRosina Winfred/
Winfred RosinaRosina EleanorRosina GwenRosina TemperanceCelia Rosina (okay, sounds a bit pseudo-Roman, but I like it. )
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Pronouns: s/he (varying their usage) and they (not my favourite but oh well)
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Allons-y, Alonso!