If you're going to try to pair another classic name with
Raine you need to look for one that has:
two syllables with the emphasis on the last syllable (like
Louise)
four syllables with the emphasis on the third syllable (like
Alexandra)
three syllables with the emphasis on the last syllable (like
Eloise)
Here are some suggestions that work rythmically:
Raine EloiseRaine LouiseRaine AlexandraRaine MarianaRaine EliseRaine MirandaRaine KaterinaRaine CorinneRaine Pandora