Is ranger a proper noun or command noun?

Answer 1

The noun ranger is a common noun, a word for any ranger of any kind.

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

• Terence Osborn Ranger, British Historian, co-founder of the Britain Zimbabwe Society.
• Ranger, GA (pop. 131) or Ranger, TX (pop. 2,473)
• The Texas Rangers, American League Baseball Team
• "The Lone Ranger" radio series 1933-1953, TV series 1949-1957
• "The Lone Ranger", movie to be released 2013 with Johnny Depp