I like it. I never see it as
Carol +
Lyn but as a version of
Caroline.
I adore
Caroline but can't use it as it rhymes with my surname, whereas
Carolyn doesn't (I pronounce them differently, whereas Americans seem to pronounce them the same).
Carolyn is less classy than the beauutiful historic
Caroline, but I'd consider using as a mn it to honour a
Caroline, my grandmother's sister. It seems a tad too dated for me to put in fn spot.
I have known one girl called
Carolyn Mary and one called
Caroline (middle name unknown) at my school.