Baby Name Poll Results

We are adopting two sisters from Russia soon, and we’re having a dilemma as to their names. We know that we will be changing their first names from Aleksandra and Yekaterina to Sasha and Katya. They are called Sasha and Katya anyway, so we aren’t worried about that. We are at a standstill for their middle names though. They have the patronymic middle name, which goes along with Russian naming practices. But because they are sisters, they both have the same name--Valeriyevna. We don’t really want to change their names dramatically, but we aren’t really comfortable with them having the same middle name either. We’re considering changing one middle name to Valerie/Valeria, and leaving the other Valeriyevna, but how would we justify changing one and not the other? Do you have any suggestions? Thank you!