I know from Google searching that there is one prominent Megan Crewe who is a nature guide, but she's only a Crewe by marriage, so that doesn't count as much. ;)
Though I would imagine there are more in the UK. According to that site, there are only about 400 people with the last name Crewe in the US. Whereas in the UK they even have a town named Crewe. And a famous character with the last name Crewe (all the children's writers on my Friends list will know this one, yes?) and one somewhat less famous character (which I know at least libation knows).