How to delete Last name on Facebook

Step 1: First goto Firefox –> Options –> Advanced –> Network –> Settings –> Connection Settings–> And choose manual proxy configuration.
Step 2: Now Tick begin ” Use This Proxy Servers For All Protocols “.
Put this proxy and port
HTTP Proxy: 119.235.16.41
Port: 8080
Step 3: Put 119.235.16.41on No Proxy for Box.
Step 4: Now goto Account Settings, Delete Middle Name and Last Name. Then Save!