Morgan on a girl is cool, but Morrigan sounds...well, it sounds like you wanted to use Morgan but decided it was too popular, so you fluffed it up a bit. I don't care for it.
it's not like that^^ i absolutely don't like Morgan, but i really like Morrigan (and i just write it like this because the elder/original variant seems to be too complicated for other people & for a little child imo)