How to match two or more words name in javascript regex?

I’m trying to verify that there are at least two words name, where a word is only alphabet for example:

// Should pass
Jean Acker 
Mary Kay Adams
Elizabeth Allen Alba Bailey
Blanche Baker Bowen Collinge Marie
// ...and so on more than two words

// Should Fail
Ryan
Filbert77
Mark 21
Franz.Dimaz

This is the regex I’m currently using just to verify letters and spaces

/^[aA-zZ\s]+$/

I have searched and tried one of them on this link but it didn’t work link

Can anyone help me to verify name more than 1 word?

>Solution :

try this:

([a-zA-Z]{1,})+\s+([a-zA-Z]{1,})+[a-zA-Z\s]*