It used to be fairly common among the English upper classes.
Evelyn Waugh (novelist 1903-1966) is probably the most famous. I presume it was Evelyn Wood you came across.
There are a few androgynous names - My Granddaughter is called Rowan, which is more commonly a male name, but I do know of other female Rowan's. I have known several male Lyn's - more common in Wales than the rest of Britain. Ceri is another Welsh name that can be either male or female.
And more names where the normal shortening of the name is androgynous, including by own - Alex (Alexander or Alexandra), Chris (Christopher or Crispin/Christine), Pete (Peter/Peta). And a few others.
At one time my next door neighbours were both called Chris, and a couple in work were both Pete