What they said.
And if the parent can't spell it, you know that the poor child will be correcting everyone for her whole life.
Rachael is fine, but Rachel is simpler. It hasn't been in popular use for a while. It was reasonably familiar when I was a child.
I like it. But I don't like it when folk can't spell stuff... (My middle name is incorrect on my NI card, it makes my teeth itch.)