Baby girl #2 name thoughts

As a family tradition we would like to keep sisters with the same middle name and brothers with the same middle name. Our first daughter’s name is Isabel Olivia. We are due with our second girl in September and struggling with deciding on a name. Also we need bilingual (English/spanish) friendly names as my husband is Hispanic.

My husband did have one strange thought that I think is more weird that cool. But his thought this week was have our first daughter’s middle name become our second daughter’s first name and then whatever her middle name is that will also determine the first name of our next girl if there would be another girl. Idk how I feel. Open to comments about that especially if they help me see how not weird it is. I need perspective.