Is husband a common or proper noun?

The Word husband is a common noun, a Word for any husband of anyone, anywhere.

A proper noun is the name of a specific person, place, thing, or a title; for example:

• Professor Eldon Husband, University of Houston-Clear Lake
• Husband Road, Woodlawn-Oakdale, KY or Husband Road, Forest Hill, VIC Australia
• Hire My Husband Home Repair, Benicia, CA
• "The Husband List", a novel by Janet Evanovich and Dorien Kelly