I always think of Ethel as a pig's name (must have been in a book I read once - does Ethel in the Worst Witch get turned into a pig?), but if you ignore your prejudices then Ethel is actually a nice sounding name.
I know an Edith and didn't much fancy the name before I met her, but she's so lovely that I now think it's a great name. I'm sure Ethel will be the same.
Now Senga is irredeemably awful. Hopefully that'll stay with the maiden great, great aunts where it belongs.