Should work with most englishy names of folks - NOT suitable for international use - but just fine for "make sure people locally give me a full name"
^[a-zA-Z'\u00c0-\u01ff]+[ \t]+([a-zA-Z\u00c0-\u01ff]+\.?[ \t]+)?([a-zA-Z\u00c0-\u01ff]+([\-']|[a-zA-Z\u00c0-\u01ff](\. ?)?)?)+(?<!\.|-|')[ \t]*$"