My mother had twins in 1966. For a while there was a question as to whether or not there would be three new babies. My mother had planned to name them Carla Kay, Marla Mae and Darla Day. Fortunately there were only two of them and they ended up to be Carla Sue and Darla Lou, lol! And yes, they are identical.
My son likes the word brindle as in "The pretty brindle pony". When he and his girlfriend chose their baby's name they wanted to call her Brindle but didn't want people to think about it as the name of a color so they changed the spelling to Brendlle. Go figure!