XSD Validating - Regular Expression

Question

I'm really "noob" with XSD, but I'm doing my best.

I have this XML:

<nombre_completo xmlns:xsi="xxxx "xsi:noNamespaceSchemaLocation="nombre_completo.xsd">
  <nombre>Jame Ruiz</nombre>
  <apellido1>Sancho</apellido1>
  <apellido2>Vera</apellido2>
</nombre_completo>

And This XSD:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
  <xs:element name="nombre_completo">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="nombre" type="verificar_nombre"/>
        <xs:element name="apellido1" type="xs:string"/>
        <xs:element name="apellido2" type="xs:string"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:simpleType name="verificar_nombre">
    <xs:restriction base="xs:string">
      <xs:pattern value="[a-zA-Z]*"/>
    </xs:restriction>
  </xs:simpleType>
</xs:schema>

All I Want its to Validate the name part. With a For Example Composed name: Miguel Angel, Jaime Ruiz. Or Just a Single Name like "Ramon" or "John".

I have tried:

[a-zA-Z]* [a-zA-Z]? 

But nothing.

Answer 1

[a-zA-Z]* [a-zA-Z] can accept nothing and one letter in front. so you need something like this

[a-zA-Z]+ [a-zA-Z]*

This will give any combination of letters but can't be empty

 [a-zA-Z]+

plus this that will give you empty or any combination of letters.

[a-zA-Z]*