Sadly, that won't work because we have mixed content and the sequence
needs to stay exactly the same. My examples were a bit limited but
we can see things like:

<nameGrp role="author" foreNames="Patrick F." 
    mainName="Houlihan">Houlihan, Patrick F.</nameGrp>
<nameGrp role="editor" 
    foreNames="Saul"
    mainName="Franklin">Franklin, Saul Jnr</nameGrp>

nic