What do you think of Millie if my niece is Tilly?

I don't like the name Millie so I think that the name Lillie is pretty, So I think that I would call her Lillie instead of Millie and it still rhymes with Tilly. Good luck on your future to. Amelia is a good name to, but for the nickname why not call her Melia instead of millie, To me the name millie sounds like an old folk name and like a person who works in a mill.