Contrary to the comment above, Dilys is not pronounced dil-ees, it is pronounced dil-iss. The y is pronounced as if it were the I in "industry". At least that's how it's pronounced here in Wales, where it was invented. And it is a lovely name. :)
For some reason this sounds masculine to me. Maybe because of its similarity to Dylan.
― Anonymous User 8/17/2013
Dilys Laye (1934-2009) was an English actress.
― Anonymous User 8/17/2013
"Dilys" (pronounced dil'-iss) is a Welsh adjective, meaning "genuine" or "real," used as a female first name. It is often found on legal BMD certificates denoting the certificate as authentic.