Morwen, when a girl sits in the sun without wearing a broad-brimmed hat, her hair will rarely get red, but the skin of her face is very likely to, particularly if it had been pale before.

The same, though by quite a different physiological process, applies when

He said he never would wed,
And that [was] when your head turned red.

If parents choose the name Cordelia, they always refer to Shakespeare, directly or indirectly, since no earlier or independent references of this particular spelling are known.

We should ask someone who knows the Caribbean whether that name is considered "white" there - I suspect so, but I'm not sure.