I love Rosemary 
Rosemary Thea
(Thea falls under the faith category because it means godly or divine. I also thought it could loosely honor the Dorothy in your life using the end sound thy. I also think it sounds cottagecore but that’s just my opinion. It balances the longer Rosemary beautifully.)
Rosemary Soleil
(Or Solana or Solara! To tie in with Elowyns middle name meaning and nature inspired.)
Rosemary Gretel
(Idk if it’s just me but it doesn’t get more cottagecore than Gretel it’s so storybook and with Rosemary it’s just gorgeous!)
Rosemary Georgia
(Georgia means farmer so she’s earthy without being obviously so, she is vintage like Rosemary and has such fun sounds!)
Rosemary Love
(She’s just so sweet and lovey 
)
Rosemary Gia
(Gia means god is gracious. She’s short and sweet and flows amazing with rosemary!)
Rosemary Dot
(Cutest honor name to give you that nickname I know you love!)
Rosemary Ida
(Ida feels down to earth and cottagecore to me, it means hardworking and I could picture her picking berries! In Sanskrit it can also mean Earth. Again, love the balance / flow.)
Rosemary Dawn
(Another tie in to Elowyns middle. I’m loving this one!)
Rosemary Faith
(It feels obvious for you but simple and understated and so meaningful!)