Ooh, I love na gusto mo i-combine ang Rafael at Fria! One of my mum friends did something similar and gumawa siya ng Rafiel para sa son niya, which is really sweet at unique pa. You could also try Rafel, Rafria, or even Fael as a nickname kung mas gusto mo ang shorter version, honestly, any combination ng magulang names parang instant sentimental na agad, so I think kahit alin man ang piliin mo gaganda talaga!