Could you maybe go with Sylvie, so it's still a tribute to your grandma, but a bit different?
Did your nan have any nicknames that could work?
Go for whatever is meaningful, middle names are so rarely even mentioned in real life so who cares how it flows if it means a lot to you 😁
Could you maybe go with Sylvie, so it's still a tribute to your grandma, but a bit different?