Please, please, if you live in an English-speaking country, do NOT name your child this, as it's recognizable as a synonym for the word "lies", as in fibs. That would not really be a good way to grow up, would it? I personally much prefer "Liesel".
This name isn't flattering and should stay in Germany and the Netherlands. Someone named Lies will be bullied in an English-speaking state. Why not Liesel/Liesl instead? That's much prettier.