I pronounce them like
Rose too!
Rosalyn,
Rosalin - RO-zah-linn
Rosalie - RO-zah-lee
Rosalia - ro-zah-LEE-ah, but ro-ZAH-lee-ah rolls off the tongue easier. I prefer the former, though.
Rosaleen - RO-zah-leen
Rosaline - RO-zah-line but this one I would also like as RAWZ-ah-line
Rosalind - RO-zah-lind
Rosamund,
Rosamond - also with a
Rose sound
Rosalina - same
Roslyn - ok for this one I'd definitely say RAWZ-linn but
Roselyn would be ROSE-linn.
I'm not good at explaining pronunciations. But except for
Roslyn all of the first syllables sound like the name
Rose only that I connect the
Ros- and the -lie, -mund, -line etc part so
Rosalie sounds like RO-zah-lee and not like ROSE-ah-lee. Argh I'm bad at explaining, sorry.