My dad mixed my name and my youngest sister's name up ALL the time (and mine and my mom's less often) long before Alzheimer's. My sister and I never lived under the same roof, and none of us have similar-sounding names.

Some people are just like that with names.

(I mix up the cats' names all the time, but they do not seem to care as neither deigns to respond anyway.)

(That first letter-writer makes me sad, though.)