I made the mistake of giving all my kids names with "L's" in them. Little kids cannot pronounce L's until they're about age three or four, so that means my kids' names get butchered for many, many years. While Claire can now pronounce her sisters' names correctly, she was unable to when they were born, and Molly was "Ma-wee" and Lily was "Wil-wee" for a good stretch of that first year.
Now it's time to listen to the twins butcher names. Claire is pronounced (roughly) "Car" by both the girls, but what's most interesting is the name they call each other: Huh. Yes, I typed that correctly - they do call each other "huh". As in, "Who needs a diaper change?" Answer: "huh" (as Molly points to Lily). For a while there, Lily called Molly "Meewee" which I thought was a good approximation, but she has now dropped that and calls Molly the same "huh" name.
Huh. It will be interesting to see at what point they get closer to pronouncing each others' names in a way the rest of us might expect.