I had a dream with Mefin (prn. MEV-in) in it. It's a name I've liked for a long time, and go in spurts of liking it more and less. I thought it was odd for it to appear in my dream randomly.
So Mefin is a Welsh female name that I guess you could call a contraction of Mehefin, meaning "June" (or more literally meaning midsummer). I'm not sure if it's actually used as a name, but I saw it listed somewhere once and thought it was adorable and sunny. And I love just Mef as a nn.
I don't really have any good combos though. How about...?
Mefin Abigail
Mefin Amanda
Mefin Edith
Mefin Frances
Mefin Gillian / Jillian
Mefin Harriet
Mefin Hermione
Mefin Kathleen
Mefin Marjorie
Mefin Nora / Nola
Mefin Thomasina
Mefin Winnifred
None really jump out to me a lot. Mefin Amanda and Mefin Harriet I think are my favorites.