This number keeps calling my office number. I do not recognize it. I do not pick it up but would love to know who they are as they do not leave a message.

Keeps calling, really annoying to switchboard - leaves no message

The person identifies himself on my tagline as  Rupert Lindsey, but doesn't leave a message when I send it to voicemail.

Calls place of business, asks for owner by name (not a big secret).  When told not available, leaves no call-back number or any information.