I never thought much about it until a year or so ago. I went hunting for new favorites and came across
Sibyl.
It gives me a British WWII era feeling, perhaps because of Dame
Sibyl Thorndyke, the actress. It has a no-nonsense, non-frilly quality about it that I love.
I came to like the name
Sibylla too, because of the female lead in "
My Brilliant Career." (I highly recommend the movie.)
The only spelling that I like is
Sibyl. People might be more comfortable with the
Sybil spelling because of
Sylvia. But the purist in me says
Sibyl or nothing.