What do you think of these names for boy / girl twins?

Dylan and Madeleine sound cute together! Madeleine and Dylan are definitely the best spellings. Yes, Madeleine is pronounced Mad-Uh-Lynn, just don't use the spelling Madeline, cos that's pronounced Mad-Uh-Line. The spelling Madelyn is very overused at the moment, whereas Madeleine is more unusual. :]