Validate name and surname using regex

I am trying to write a regex for name and surname. They are made by one or more words that can be made only by alphabetical letter (I don't care initial capital letters).

I would like to match for both name and surname:

Names:

- Antony de Home April
- antony de Home April
- ANTONY de Home ApRil
- aNtOnY de Home April
- Antony de d'home APRil
- Antony de d'Home ApRil
- Antony de D'Home April
- Antony de d'HOME AprIL
- ...

Surname match the same cases as names.

I would not (no numbers or special characters):

Names:

- Antony1 de Home Ap*ril
- Antony_ de Home Apr+il
- Ant_ony de Home Apr#il
- Antony@ de Ho@me Apr^il
- ...

Surname match the same cases as names.

How I can write that?

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UPDATE

I would like to match fo开发者_运维百科r both name and surname:

Names:

- Antòny de Homé April
- àntony de Home ùpril
- Antony de Home Aprìl

If you have other suggestions for name and surname validation, let me look!

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This sould be your regex:

[A-Za-z]+\s+['A-Za-z]+

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/([a-Z]+)\s([a-Z]+)/

of course I make a number of assumptions with this regex.